# Questions Asked onOctober 26, 2010

2. ## Chemistry

the activation energy for the decomposition of HI(g) to H2(g) and I2(g) is 186kj/mol. the rate constant at 555k is 3.42 x 10^-7 L/mol*s. What is the rate constant at 645K? Please show all steps USING THE ARRHENIUS EQUATION. Here is my work so far: K = A

A petty cash fund of \$100 is replenished when the fund contains \$3 in cash and receipts for \$93. The entry to replenish the fund would debit Cash Over and Short for \$4. credit Miscellaneous Revenue for \$4. credit Cash Over and Short for \$4. debit

4. ## physics

A projectile is fired at an upward angle of 45 degrees from the top of a 265 m cliff with a speed of 350 m/s. What will be it's speed when it strikes the ground below?

5. ## math

the system of linear equations below has a unique solution for all but one value of a: 6 x−12 y=−6 58 x+a y=−58 What is this exceptional value for a?

6. ## Science

PLEASE HELP Science Test Friday Study Guide? I have 1 to 22 already but I am stuck now I have to have this completed and correctly for my study guide. I have a C right now I need an A on this test to bring it up to a B or I stay on restriction please help

7. ## chemistry

Exactly 10mL of water at 25 degrees C was added to a hot iron skillet. all of the water was converted into steam at 100 degrees C. If the mass of the pan was 1.20 kg and the molar heat capacity of iron is 25.19 L/mol*C, what was the temp change of the

8. ## Math

Why did Airhead eat the dollar he brought to school

9. ## Statistics

Find the probability that at most 5 defective bolts will be found in a box of 200 bolts if it is known that 2 per cent of such bolts are expected to be defective .(you may take the distribution to be Poisson; e-4= 0.0183).

10. ## 3rd grade shurley english

what does s, f,scs, scv mean when indentifying(labeling) sentences thanks

11. ## chemistry

Lead is often found in Earth's crust as several lead compounds. Calculate the mass in kilograms of the amount of each of the following lead compounds that contains 4500kg of lead. 1)PbCO3 (cerussite) 2) PbSO4(anglesite)

12. ## chemistry

write a net ionic equation for the following: 1)Iron (III) chloride reacts with Potassium hydroxide to produce Iron (III) oxide, Potassium chloride, and Hydrogen gas. 2)Hydrochloric acid reacts with Potassium carbonate to produce Potassium chloride,

13. ## Chemistry

Electromagnetic radiation with a wavelength of 665 nm appears as orange light to the human eye. The energy of one photon of this light is __________ J.

14. ## Statistics

find the 90% confidence interval for the variance and standard deviation of the ages of seniors at Oak Park College if a sample of 24 students has a standard deviation of 2.3 years. Assume the variable is normally distributed. Can someone explain the steps

15. ## calculus

A particle is moving along the curve below. y = sqrt(x) As the particle passes through the point (4,2), its x-coordinate increases at a rate of 4 cm/s. How fast is the distance from the particle to the origin changing at this instant?

16. ## Physics

A baseball is thrown at an angle of 25 degrees relative to the ground at a speed of 23.0 m/s. If the ball was caught 42.0 m from the thrower, how long was it in the air? How high was the tallest spot in the ball's path?

17. ## chemistry

A pure copper cube has an edge length of 2.00cm. How many copper atoms does it contain? (volume of a cube = (edge length)^3; density of copper = 8.96g/cm^3 )

18. ## chemistry

i already posted this question, but im still confused on it. Dinitrogentetraoxide partially decomposes according to the following equilibrium: N2O4 (g) -> 2NO2 (g) 2NO2 (g) Initial conc. 0.400 mol 0 mole (no reaction yet) Change -0.3945 mol + 2 x 0.3945

19. ## Chem

Which of the following will be more soluble in an acidic solution than in pure water? 1.PbBr2 2.CsClO4 3.Cd(OH)2 4.Ag2(SO4) 5.BaSO3 How can I find which is which? Could you tell me the best way to find which one is more soluble? Thank you!

20. ## physics

Estimate the force with which a karate master strikes a board if the hand's speed at time of impact is 4.78m/s, decreasing to 1.55m/s during a constant time of 0.00239 s with the board. The mass of coordinated hand and arm is 0.701 kg. Answer in units of

21. ## spanish

for homework we have to unscramble these words: lcpoa, maidolrg, caluphin, masarac, patneon, pelpa padcoi can anyone help?

22. ## physics

A child holds a sled on a frictionless, snow- covered hill, inclined at an angle of 29◦. If the sled weighs 61 N, find the force ex- erted on the rope by the child. Answer in units of N.

23. ## Chem.

λ for one line of the hydrogen spectrum is .4118 x 10-4 cm. Use this value in the Rydberg equation to calculate the RH value using n1 = 2, and n2 = 6.

24. ## science

How much heat in kcal must be added to 0.32 kg of water at room temperature (20°C) to raise its temperature to 36°C?

25. ## Calculus

Find the differential dy and evaluate dy for the given values of x and dx. y=cosx x=pi/3 dx=0.05 2) y=e^x/10, x=0, dx=0.1 This is a different format than my teacher used in class so I'm confused. Help please!

26. ## physics

Blood of density 1010kg/m^3 that is to be administered to a patient is raised about 1.51 m higher than the level of the patient's arm. How much greater is the pressure of the blood than it would be if the container were at the same level of the arm? The

27. ## chemistry

How many liters of a 0.530M sucrose (C12H22O11) solution contain 1.3kg of sucrose?

28. ## physics

A child holds a sled on a frictionless, snow- covered hill, inclined at an angle of 29◦. If the sled weighs 61 N, find the force ex- erted on the rope by the child. Answer in units of N.

29. ## chem 101

using the unit conversion method derive an equation to calculate heat produced from the HCl-Na OH reaction

30. ## chemistry

write a net ionic equation for the following: Copper (II) sulfate reacts with Ammonium hydroxide to produce Copper (II) oxide, Ammonium sulfate, and water.

31. ## physics

A 0.005-kg bullet traveling horizontally with a speed of 1.00 103 m/s enters an 20.3-kg door, imbedding itself 10.6 cm from the side opposite the hinges as in the figure below. The 1.00-m-wide door is free to swing on its hinges. (c) At what angular speed

32. ## Chemistry

At 298.K and 1.00 atm, assume that 22 mL of NO gas reacts with 18 mL of oxygen gas and excess water to produce nitric acid according to the following equation: 2 NO(g) + 3/2 O2 (g)+ H2O(l)?? 2 HNO3(g). If all of the nitric acid produced by this reaction is

33. ## Chemistry

One of the concerns about the use of Freons is that they will migrate to the upper atmosphere, where chlorine atoms can be generated by the following reaction: CCl2F2 --> CF2Cl + Cl Chlorine atoms can act as a catalyst for the destruction of ozone. The

34. ## Phsyics

A bullet of mass 1.8 X 10-3 kg is moving at +500. m/s when it impacts a tree stump. It penetrates into the stump 6.00 centimeters before coming to rest. 1. Assuming the acceleration to be constant, calculate the force (including direction) exerted by the

35. ## physics

A 3.0 m long rigid beam with a mass of 100 kg is supported at each end. An 60 kg student stands 2.0 m from support 1. How much upward force does each support exert on the beam? support 1- support 2-

36. ## chemistry

Am doing a lab report on the determination of the product of a redox reaction: the reaction of bromate and hydroxylammonium ions. here is the lab Experiment: In this experiment you will determine the equation of a redox reaction by the use of experimental

37. ## English

I have to tell if the verb is transitive or intransitive 1. Most people think of Bamboo as a tree or bush? 2. Bamboo belong to the grass family. 3. More than 500 kinds of bamboo grow in the tropic? 4.These plants thrive in warm climate. 5. People use

38. ## Finance

Suppose you buy a 7% coupon, 20 year bond today when it's first issued. If interest rates suddenly rise to 15%, what happens to the value of your bond?

39. ## Calculus

The burning candle A candle is placed a distance l1 from a thin block of wood of height H. The block is a distance l2 from a wall as shown in Figure 7.1. The candle burns down so that the height of the flame, h1 decreases at the rate of 3 cm/hr. Find the

40. ## physics

A 625-kg racing car completes one lap in 14.3 s around a circular track with a radius of 55.0 m. The car moves at constant speed. (a) What is the acceleration of the car?

41. ## Chemistry

the activation energy for the decomposition of HI(g) to H2(g) and I2(g) is 186kj/mol. the rate constant at 555k is 3.42 x 10^-7 L/mol*s. What is the rate constant at 645K? Please Show all Steps! thank you!

42. ## Statistics

A packaging device is set to fill detergent power packets with a mean weight of 5 Kg. The standard deviation is known to be 0.01 Kg. These are known to drift upwards over a period of time due to machine fault, which is not tolerable. A random sample of 100

43. ## chemistry

During a strenuous workout, a student generates 2000 kJ of heat energy. What mass of water would have to evaporate from the student's skin to dissipate this much heat?

44. ## physics

Suppose that a binary star system consists of two stars of equal mass. They are observed to be separated by 330 million kilometers and take 3.0 Earth years to orbit about a point midway between them. What is the mass of each?

45. ## Chem

Classify each situation by the equation that would quantify it. A. A container of ammonia cleaner is stored in the janitor's closet off a lecture hall after being used at night for cleaning. The container has a very small hole in the lid. The next morning

46. ## physics

A 3.0-kg body is initially moving northward at 15 m/s. Then a force of 15 N, toward the east, acts on it for 4.0 s. (a) At the end of the 4.0 s, what is the body’s final velocity? (b) What is the change in momentum during the 4.0 s?

Meg's pension plan is an annuity with a guaranteed return of 7% interest per year (compounded monthly). She would like to retire with a pension of \$20000 per month for 20 years. If she works 28 years before retiring, how much money must she and her

48. ## chemistry

what is the name for the compound Al2I3??

49. ## US History

3. Many senators opposed American entry into the League of Nations because a. they feared it would weaken the country's independence b. they disapproved of its other member countries c. they wanted stronger promises of support from other countries d. they

50. ## College Chemistry

Given that delta Hrxn for OH- ions is -229.6 kJ/mol, calculate the enthalpy of neutralization when I mole of a strong monoprotic acid (such as HCl) is titrated by 1 mole of a strong base (such as KOH) at 25-degrees C.

51. ## trig

if sin theta = 2/3 in quadrant 1, find sec theta. HELP!!!

52. ## statistics

a survey from a research firm found that 30% of teenage consumers receive their spending money from part-time job.if five teenagers are selected at random,find the probability that only three of them will have part-time jobs.

53. ## Chemistry

One method of removing CO2(g) from a spacecraft is to allow the CO2 to react with LiOH. 2LiOH(s)+CO2(g)---->Li2CO3(s)+H2O(l) How many liters of CO2(g) at 25.5 degrees celsius and 749 Torr can be removed per 9kg of LiOH consumed?

54. ## college Physics

Two identical 0.18 kg blocks (labeled 1 and 2) are initially at rest on a nearly frictionless surface, connected by an unstretched spring, as shown in the upper diagram, where x2 = 0.06 m. Then a constant force of 9 N to the right is applied to block 2,

100 milliliters of 10 degrees celsius water plus 100 milliliters of 90 degrees celsius water, what is the final temperature?

56. ## physics

A motorcycle (mass of cycle plus rider = 3.0 102 kg) is traveling at a steady speed of 20 m/s. The force of air resistance acting on the cycle and rider is 1.8 102 N. Find the power necessary to sustain this speed under the following conditions. (a) the

57. ## physics

A motorboat accelerates uniformly from a velocity of 6.5 m/s to the west to a velocity of 1.5 m/s to the west. If its acceleration was 2.7 m/s to the est, how far did it travel during the acceleration

Internal controls are concerned with?

59. ## Physics

A 160 kg astronaut (including space suit) acquires a speed of 2.20 m/s by pushing off with his legs from an 1950 kg space capsule. What is the change in speed of the space capsule? As the reference frame, use the position of the space capsule before the

60. ## econ

american and japanese workers can each produce 4 cars a year.An American worker can produce 10 tons of grain a year,whereas a japanese worker can produce 5 ton of grain a year.to keep things simple,assume that each country has 100 million workers.

61. ## Chemistry

Arrange the following atoms in order of increasing effective nuclear charge experienced by the electrons in the n = 3 electron shell: K,Mg,P,Rh,and Ti. I think that the effective nuclear charge increases as you go up a group and across a period. so Rh, K,

62. ## Physics

A 930 kg sports car collides into the rear end of a 2500 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.6 m/s before stopping. The police officer, knowing that the coefficient of kinetic friction

63. ## Physics

A block of mass = 2.20 kg slides down a 30.0 deg incline which is 3.60 m high. At the bottom, it strikes a block of mass = 7.00 kg which is at rest on a horizontal surface . (Assume a smooth transition at the bottom of the incline.) If the collision is

64. ## calculus

A landscape architect wishes to enclose a rectangular garden on one side by a brick wall costing \$30/ft and on the other three sides by a metal fence costing \$20/ft. If the area of the garden is 2,000 ft2, find the dimensions of the garden that minimize

65. ## Social Stuides

Why did the French and Spanish start fighting?

66. ## Chemistry

Arrange the following atoms in order of increasing effective nuclear charge experienced by the electrons in the n = 3 electron shell: K,Mg,P,Rh,and Ti. I think that the effective nuclear charge increases as you go up a group and across a period. so Rh, K,

67. ## Physics

A 160 kg astronaut (including space suit) acquires a speed of 2.20 m/s by pushing off with his legs from an 1950 kg space capsule. What is the change in speed of the space capsule? As the reference frame, use the position of the space capsule before the

68. ## Physics - Charged objects (check + help)

Three charged objects are located t the vertices of a right triangle. Charge A (5*10^-6) has Cartesian coordinates (0,4; Charge B (-5.0*10^-6) is at the origin; charge c (+4.0*10^-6) has coordinates (5,0), where the coordinates are in meters. What is the

70. ## science

In order for conduction to occur particles must make what?

71. ## chemistry

What volume of each of the following solutions contains 0.13mol of KCl? 1).345M of KCl 2)2.0M of KCl 3).895M of KCl

72. ## math

terri makes flower bouquets with exactly 3 roses and 5 daisies in each bouquet. she has 72 roses. how many daisies will she need to make the bouquets?

73. ## Stats

Suppose that 8% of a certain batch of calculators have a defective case, and that 11% have defective batteries. Also, 3% have both a defective case and defective batteries. A calculator is selected from the batch at random. Find the probability that the

74. ## Physics

Kevin stands at the edge of a cliff, holding one ball in each hand. He throws one of the balls straight up with speed v, and at the same time he throws the other ball straight down, also with speed v. Ignoring air resistance, which ball hits the ground

75. ## chemistry

what volume in Liters of 0.15M KCl solution is required to completely react with 0.150 liter of a 0.175M Pb(NO3)2 solution according to the following balanced equation? 2KCl(aq)+ Pb(NO3)2(aq)-PbCl2(s)+ 2KNO3(aq)

76. ## Physics

An object is released from rest. How far does it fall during the third second of its fall?

77. ## Geometry

the measures of three angles of a triangle are in the ratio 4:5:6. Find the measure of each

78. ## Health care finance

John Doe is in the 40 percent tax bracket. He is considering investing in HCA bonds that carry a 12 percent interest rate. A. What is his after-tax interest rate on the bonds?

79. ## gen Chem

I've attempted this problem but not sure if i'm on the right track. Use the enthalpy diagram provided above and apply Hess’s Law to determine the standard enthalpy of formation for C12O36H20N12 (s) using the results from part (a) and the following

80. ## Chemistry

What is the wavelength lambda of the photon that has been released in 2.05x10^-18?

81. ## AP Physics

A stone is tied to a string (length = 0.450 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the

82. ## physics

a 5-kg crate is resting on a horizontal plank. the coefficient of static friction is .5 and the coefficient of kinetic friction is .4. after one end of the plank is raised so the plank makes an angle of 25 degrees with the horizontal, the force of friction

83. ## Physics

Two balls, of masses mA = 34 g and mB = 60 g, are suspended as shown in the figure . The lighter ball is pulled away to a 60 degree angle with the vertical and released. The length of the string is 30cm. What will be the maximum height of each ball after

84. ## chemistry

A buffer solution contains 0.200 M NH3 and 0.250 M NH4Cl. What is the pH of the buffer solution after the addition of 10.0 mL of 0.100 M NaOH to 50.0 mL of the buffer? Kb for NH3 is 1.8 x 10-5.

85. ## IPC

The latent heat of vaporization of ethanol is 200 calories/gram. This means that _____. a) about 200 calories of heat must be added to 1 gram of ethanol to change its temperature b) about 200 calories of heat must be added to 1 gram of ethanol to convert

86. ## physics

An open barge has the dimensions l=22 m, w=40 m, and h=12m. If the barge is made out of 4.0 cm thick steel plate on each of its four sides and its bottom, what mass of coal can the barge carry in fresh water without sinking? Is there enough room in the

87. ## Physics Help!!

Hurricanes can involve winds in excess of 120 km/h at the outer edge. Make a crude estimate of the energy of such a hurricane, approximating it as a rigidly rotating uniform cylinder of air (density 1.3 kg*m^3 of radius 120 km and height 4.5 km. Make a

88. ## Financial Management

You purchased WPC common shares for \$50 on year ago. You have received total dividends equal to \$8 during the year. If your total return during the period is 12%, then what was the price of WPC when you sold the stock today?

89. ## Physics

You are very slowly pushing up an incline with a calculator sitting on it. The coefficient of static friction is 0.7. At what angle θ will the calculator start sliding?

90. ## calculus

A particle is moving along the curve y=4((3x+1)^.5). As the particle passes through the point (5,16) its -coordinate increases at a rate of 2 units per second. Find the rate of change of the distance from the particle to the origin at this instant.

91. ## math

Amy earns \$0.16 per unit for the work she does. For all units she produces in a week over 1,000, she receives \$0.26. What were her weekly earnings if she produced 1,725 units in one

92. ## accounting

Pearson corporation makes an investment today (January 1, 2010). They will receive \$10,000 every December 31st for the next six years (2010-2015) If pearson wants to earn 12% on the investment, what is the most they should invest on January 1, 2010? A)

93. ## Physics C: Mechanics

A yo-yo has a rotational inertia of 760 g·cm2 and a mass of 200 g. Its axle radius is 4.0 mm, and its string is 100 cm long. The yo-yo rolls from rest down to the end of the string. (a) What is the magnitude of its linear acceleration? cm/s2 (b) How long

94. ## 5th math

how many 3,000s in 270,000? and how many 90s in 63,000? please show me the work also , so i can do the rest right. thanks

95. ## Stats

Suppose that 8% of a certain batch of calculators have a defective case, and that 11% have defective batteries. Also, 3% have both a defective case and defective batteries. A calculator is selected from the batch at random. Find the probability that the

96. ## Physics

A 3.6 m diameter merry-go-round is rotating freely with an angular velocity of 0.78 rad/s. Its total moment of inertia is 1700 kg m^2. Four people standing on the ground, each of mass 62 kg, suddenly step onto the edge of the merry-go-round. What is the

97. ## chemistry

A piece of iron(10)moles was dissolved in contrated Hcl.the reaction was form H2 and Fecl2. determine the amout of Fecl2 formed.

98. ## Phsyics

A bullet of mass 1.8 X 10-3 kg is moving at +500. m/s when it impacts a tree stump. It penetrates into the stump 6.00 centimeters before coming to rest. 1. Assuming the acceleration to be constant, calculate the force (including direction) exerted by the

99. ## Physics

The first stage of a space vehicle consumed fuel and oxidizer at the rate of 1.60 multiplied by 104 kg/s, with an exhaust speed of 2.55 multiplied by 103 m/s. (a) Calculate the thrust produced by these engines. answer should be in N (b) Find the

100. ## physics

In a game of basketball, a forward makes a bounce pass to the center. The ball is thrown with an initial speed of 3.9 m/s at an angle of 13.8° below the horizontal. It is released 0.65 m above the floor. What horizontal distance does the ball cover before

101. ## Chemistry - College

The ionization energy of a certain element is 472 kJ/mol. However, when the atoms of this element are in the first excited state, the ionization energy is only 166 kJ/mol. Based on this information, calculate the wavelength of light emitted in a transition

102. ## english

I am going to write about illegal immigration and my topic is putting fence on the border and I am for it. my question that i need help with is, How can fence reduce illegal immigration? Thanks for your help?

103. ## Chemistry

The O−H bond enthalpy is 463 kJ/mol. What is the wavelength of light that will cause dissociation of H2O into the hydrogen atom and the hydroxyl radical

104. ## math

kelly subtracted 2.3 from 20 and got 17.7 explain why this answer is reasonable

105. ## Math

Perform the requested operation or operations. f(x) = 4 - 4x, g(x) = -9x + 4 Find (f + g)(x).

106. ## Calculus

When a ball is thrown straight down from the top of a tall building, with initial velocity 30 ft/sec, the distance from the release point at time t in seconds is given by s(t)=16t^2+30t. If the release point is 300 ft above ground, what is the velocity of

107. ## Physics

You are very slowly pushing up an incline with a calculator sitting on it. The coefficient of static friction is 0.7. At what angle θ will the calculator start sliding?

108. ## physics

A 4111.0 kg truck is parked on a 14.6° slope. What is the friction force on the truck?

109. ## physics

Hurricanes can involve winds in excess of 120 km/h at the outer edge. Make a crude estimate of the energy of such a hurricane, approximating it as a rigidly rotating uniform cylinder of air (density 1.3 kg/m^3) of radius 120 km and height 4.5 km. Make a

110. ## Chemistry

A buret (initial and final buret reading were 2.20 mL and 11.86 mL) was used to deliver a sample of 2.1E-5 M stock dye into a 25.0 mL volumetric flask. The dye was then diluted with water to exactly 25.0 mL. Calculate the molarity of the resulting

111. ## physics

A projectile of mass 1.450 kg is shot straight up with an initial speed of 20.0 m/s. (a) How high would it go if there were no air friction? (b) If the projectile rises to a maximum height of only 13.9 m, determine the magnitude of the average force due to

112. ## college algebra

Use the theorem on bounds to establish the best integral bounds for the roots of the equation w^(4)-8w^(3)+2w^(2)+10w-1=0

113. ## algerbra1

translate to an algebraic expression 49 less than b

114. ## Science

Working on the Amazon River, a biologist isolated DNA from two unknown organisms, P and Q. He discovered that the adenine content of P was 15% and the cytosine content of Q was 42%. This means that: a) the amount of guanine in P is 15% b) the amount of

115. ## college chemistry

Calculate the [CH3NH3+] of a 7.02×10-3 M solution of the weak base CH3NH2 (make an approximate calculation assuming that initial concentration is equal to the equilibrium concentration). Round your answer to 3 significant digits. CH3NH2 + H2O = CH3NH3+ +

116. ## Physics - Charges on objects (check + help)

Two identical objects have charges from +6.0*10^-6 and -2.0*10^-6, respectively. When placed a distance d apart, their force of attraction is 2,0N. If the objects are touched together, then they moved to a distance of separation of 2d, what will be the new

117. ## math

Question: A student took a test composed of 20 question, with correct answers worth 2 points. If the student received 34 points for his grade, how many questions were correct? I KNOW THE ANSWER IS 17 BUT PLEASE PUT IN AN EQUATION FORM ex: (20x2)-34 =

118. ## Ethical and Legal Issues

Let’s start this discussion by providing examples of an ethical duty or ethical obligations you have encountered in your life. What are some examples of rules at WORK that might cause a conflict with your ethical standards? 1. What was that duty or

119. ## Science

Name 6 types of heat creating energy

120. ## algebra

Express each situation as an algebraic expression: 1. An electric company charges \$10 a month plus \$.15 per kilowatt-hour of electricity used. What is the monthly bill in dollars if K kilowatt-hours are used?

121. ## physics

Ball 1, with a mass of 180 g and traveling at 18 m/s, collides head on with ball 2, which has a mass of 370 g and is initially at rest (a) What are the final velocities of each ball if the collision is perfectly elastic? (b) What are the final velocities

122. ## chem

35.00 grams of propane C3H8 are burned. How many grams of CO2 ARE PRODUCED

123. ## chemistry

is Sodium Dichromate a binary or Ternary compound?

124. ## chemistry

A chemist wants to make 3.1L of a 0.104M solution. How much KCl in grams should the chemist use?

125. ## Phsyics

A bullet of mass 1.8 X 10-3 kg is moving at +500. m/s when it impacts a tree stump. It penetrates into the stump 6.00 centimeters before coming to rest. 1. Assuming the acceleration to be constant, calculate the force (including direction) exerted by the

126. ## Physics

A small block of mass m1 = 0.400 kg is released from rest at the top of a curved-shaped frictionless wedge of mass m2 = 3.00 kg, which sits on a frictionless horizontal surface as in Figure P9.60a. When the block leaves the wedge, its velocity is measured

127. ## english

An example of the frame story is _____. 1)"The Celebrated Jumping Frog of Calaveras County 2"The Lady, or the Tiger?" 3)"The Necklace" i think its number 1?

128. ## physics

10 moles of a gas initially at temperature 300 K is compressed adiabatically from a volume of 2 cm3 to a volume of 325 cm3. To the nearest tenth of a joule what is the work done by the piston? (It is a monatomic ideal gas.)

suppose you invested \$1200 for four years. you earned \$312 in simple interest. what is the interest rate?

130. ## Chemistry

Write balanced equations for the following reactions. Express your answer as a chemical equation. Identify all of the phases in your answer. 1. chromium (III) oxide with dilute hydrochloric acid A: Cr2O3 (s) + 6HCl (aq) ---> 2CrCl3 (s) + 3H20(l) (my phases

Lack of iron in the photic zone of the open ocean restricts the size of plankton populations. Iron is what kind of factor for marine plankton?

132. ## Physics

A bicycle chain is wrapped around a rear sprocket (r = 0.038 m) and a front sprocket (r = 0.11 m). The chain moves with a speed of 1.6 m/s around the sprockets, while the bike moves at a constant velocity. Find the magnitude of the acceleration of a chain

133. ## Calculus

A particle is moving along the curve y = 2 √{3 x + 7}. As the particle passes through the point (3, 8), its x-coordinate increases at a rate of 4 units per second. Find the rate of change of the distance from the particle to the origin at this instant.

134. ## physics

A railroad car of mass 2.3*10^4 kg moving at 4.00 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.20 m/s. (a) What is the speed of the three coupled cars after the

135. ## Chem

In an automobile engine, at the end of the upstroke the piston is at its maximum height in a cylinder of exact dimensions. At this time, a precisely measured mixture of fuel and oxidant ignites to form gaseous products. If the ignition temperature is

136. ## accounting

mordica company will receive \$100,000 in 7 years. If the appropriate interest rate is 10%, the present value of the \$100,000 receipt is (A) \$51,000 (B) \$51,316 (c) \$151,000 (D) \$194,872

137. ## College algebra

Find the equation with x-intercepts (4,0),(-3,0) and (2,0) and y-intercept (0,12)

138. ## Physics

A large plate falls to the ground and breaks into three pieces. m1 falls with v1=3m/s, 25 degrees to the left from the vertical. m2 falls with v2=1.79m/s, 45 degrees up from the horizon. And m3=1.3kg falls with v3=3.07m/s vertically down. How would I find

139. ## Physics - Spring

Suppose a 1.5kg block of wood is slid along a floor and it compresses a spring that is attached horizontally to a wall. The spring constant is 555N/m and the block of wood is traveling 9.0m/s when it hits the spring. Assume that the floor is frictionless

140. ## physics

Hurricanes can involve winds in excess of 120 km/h at the outer edge. Make a crude estimate of the energy of such a hurricane, approximating it as a rigidly rotating uniform cylinder of air (density 1.3 kg*m^3 of radius 120 km and height 4.5 km. Make a

141. ## physics

Two race cars are speeding around the racetrack at different speeds. One goes around the track in 2 minutes; the other goes around the track in 1½ minutes. How often does the faster car pass the slower car? Is there a formula to figure this out?

142. ## ap history

On a chart what are the arguments for and against American expansion to the Pacific even at the expense of the war with Mexico in the 1840's

143. ## chemistry

A reaction starts with 1.00 mol each of PCl3 and Cl2 in a 1.00-L flask. When equilibrium is established at 250 degree Celsius in the reaction PCl3(g)+ Cl2(g)--> PCl5(g), the amount of PCl5 present is 0.82 mol. What is Kc for this reaction?

144. ## physics

A tornado lifts a car to a height of 125m above the ground. The tornado flings the car horizontally with a speed of 90.0 m/s. How long does the car take to reach the ground?

145. ## Global Issues (ms.sue)

It is a known fact that all though there are some countries in the world that are abundant in wealth and possessions, there are also other countries at different parts of the world which are developing countries and are deprived of most of the goods that

146. ## Probability

You type four letters to four different people and address the envelopes. If you then insert the letters into the envelopes randomly, what is the probability that exactly three letters will go into the correct envelopes?

147. ## math..probabilities

You type four letters to four different people and address the envelopes. If you then insert the letters into the envelopes randomly, what is the probability that exactly three letters will go into the correct envelopes? 1/2 1/3 1/4 0 Explain your answer.

148. ## Chemistry

1. Reactions follow the law of conservation mass.- T? 3. In a chemical equation, the material to the left of the arrow equals the material on the right.- T 8. In a single replacement reaction, sodium (Na) doesn't replace hydrogen.- F? 16. Increased

149. ## Calculus

At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 18 knots and ship B is sailing north at 22 knots. How fast (in knots) is the distance between the ships changing at 6 PM? (Note: 1 knot is a speed of 1 nautical mile per

150. ## algebra

the three angles of a triangle are 3x,x+10, and 2x-40. Find the size of the smallest angle in a triangle

151. ## Physics

You are very slowly pushing up an incline with a calculator sitting on it. The coefficient of static friction is 0.7. At what angle θ will the calculator start sliding?

152. ## physics

A rotating cylinder about 16 long and 6.2 in diameter what angular speed must it rotate?

153. ## biology

The structures in bryophytes that penetrate the ground and act like roots are a. xylem b. phloem c. rhizomes d. rhizoids

154. ## Algebra check+help?

Write the equation so that y is is a function of x. 1) 5x+4y=10 Would you minus the 5 from the 10 first? and 4y=5-10? Because she only wants us to write the equation, not exactly solve for it. And doesn't want us to overthink. Could I please have someones

155. ## Math

this number has 4 places to the right of the decimal point. It has 2 hundredths, 3 then thousandths, and 1 tenth. It is in between 240 and 242. The thousandths place is one less than the ten thousandths and less than the hundresths. What are six numbers

156. ## geometry

How do I find the length of the segment AB when A(-4,6) and B(3,-5)

157. ## Accounting

Milner company will invest \$200,000 today. The investment will earn 6% for 5 yearswith no funds withdrawn. In 5 years, the amount in the investment fund is A) \$200,000 B) \$260,000 C) 267,646 D) \$268,058

suppose u invested some money at 8% simple interest for five years. if u received \$500 in interest, how much money did u invest?

159. ## Physics

Berry Bonds hits a baseball ball with an initial speed of 35m/s at an angle of 50 degrees with respect to the horizon. The playing field is surrounded by a 4.0m tall wall. Assume that when hit, the ball is initially very close to the ground. If the

160. ## financial management

What role do present value and future value have in the management of an organization?

161. ## math

the width of a rectangle is one half its lengh. The perimeter of the rectangle is 54 cm. What are the width and length of the Rectangle?

162. ## Chemistry

A first-order reaction has rate constants of 4.6 x 10^-2 inverse seconds and 8.1 x 10^-2 inverse seconds at 0 degrees C and 20 degrees C respectively. what is the value of the activation energy? Please show all steps!! Thank You!

163. ## Physics

In a friendly game of handball, you hit the ball essentially at ground level and send it toward the wall with a speed of 16 m/s at an angle of 32° above the horizontal. a) How long does it take for the ball to reach the wall if it is 5.2 m away? (b) How

164. ## Finance

The Star Restaurant Company owns and operates Chinese restaurants throughout the northwestern United States. Paris Brown, vice president of development, has been analyzing a new metropolitan market for expansion opportunities. The company’s best option

166. ## math

A vehicle leaves a skid mark of 40 ft before stopping. What has the approximate speed of the vehicle before it stopped? (the formula is speed=.7 times length, then find the square root times 5.5) Is is 25-35 mph?

167. ## Calculus

When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV1.4=C where C is a constant. Suppose that at a certain instant the volume is 470 cubic centimeters and the pressure is 89 kPa and is

168. ## physics

A woman has a mass of 42.9 kg. What is her weight on earth? and what is her weight on the moon, where g=1.17 m/s2

what is the longest multiplication combination for 120

170. ## physics

the force stretching the D string on a certain guitar is 150 N. the String's linear mass density is .005 Kg/m. What is the speed of waves on the string?

172. ## physics

A 47.0 g golf ball is driven from the tee with an initial speed of 60.0 m/s and rises to a height of 24.4 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 7.0 m below its

Lack of iron in the photic zone of the open ocean restricts the size of plankton populations. Iron is what kind of factor for marine plankton?

174. ## math

Solve the two sided inequality and show the solution on real line 7 < 1-2x ≤ 10 Given two functions as: f(x) = x2-x-1 and g(x) = 3/x Find fog(x) also find the domain of f, g and fog

175. ## 3rd homework

think about how the word safe relates to dangerous. what words relate in the same way? safe: dangerous a) remove:add b) canyon:rim c) dangle:plank d) grip:jackhammer I am thinking "A" is the correct answer but unsure. Please advise. Thanks!

176. ## spanish

Hoy en dia pavos SON perdonados en caso de que el pavo no este disponible para el perdón presipdencial. Is SON correct in this sentence and if it is, why?

177. ## Math

Perform the requested operation or operations. f(x) = 2x - 9, g(x) = 4x - 4 Find (f - g)(x).

178. ## US History

9. How did Woodrow Wilson's reform platform during the 1912 campaign differ from that of Theodore Roosevelt? a. Wilson supported federal regulation of business b. Wilson promised to preserve free economic competition c. Wilson supported tariff reduction d.

179. ## physics

A 47.0 g golf ball is driven from the tee with an initial speed of 60.0 m/s and rises to a height of 24.4 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 7.0 m below its

180. ## physics

A 3.00 102 N force is pulling an 80.0 kg refrigerator across a horizontal surface. The force acts at an angle of 18.0° above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 8.00 m a) Find the work done

181. ## english

Please help with this assignment!Thanks. I picked "Justice" I want to write about What is the moral aspect of Justice. Tell how can I write like the following below. Have to write like this and don't know how to go about it.Thanks! Definition Read the

182. ## help! physics

Right after clearing the launch tower, the space shuttle is accelerating upward at 6 m/s/s. Calculate the net force on an 80 kg astronaut during this acceleration and the force that the seat must exert on the astronaut during this acceleration.

183. ## English

Can you please check these sentences. I have to list the adverb then tell which word or words it modifies. 1.Yesterday I saw an exhibit of extremely rare books at the museum. 2.The paper in this old book is particularly fragile. 3.Old books must be handled

184. ## math

I am a fraction equivalent to 2/4.The sum of my numerator and my denominator is 21. what fraction am I?

185. ## trig

Find the values of the trigonmeric functions of t from the given information cos t = -4/5 terminal point of t is in quadrant III

186. ## math..probabilities

You type four letters to four different people and address the envelopes. If you then insert the letters into the envelopes randomly, what is the probability that exactly three letters will go into the correct envelopes? 1/2 1/3 1/4 0 Explain your answer.

187. ## AP Physics

A stone is tied to a string (length = 0.450 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the

188. ## geometry b

in a circle,a 90 dagree sector has an area of 36 pie ft squared.what is the radius of the circle ???

189. ## physics

Right after clearing the launch tower, the space shuttle is accelerating upward at 6 m/s/s. Calculate the net force on an 80 kg astronaut during this acceleration and the force that the seat must exert on the astronaut during this acceleration.

190. ## physics

What minimum speed does a 150 g puck need to make it to the top of a 5.90 m-long, 21.0 degree frictionless ramp?

191. ## physics

Ok. I'm writing that big test tomorrow, and I have no idea what should I do with this : An alien is 5m from an astronaut. The astronaut notices the alien and they simultaneously begin to run from each other with v[alien]= 2m/s and v[astronaut] = 4m/s. Find

192. ## eth/125

Religious discrimination against Muslims and Arab-appearance people rose steeply in the United States after 9/11. Consider the differences between Arabs, Muslims, and Arab Muslim extremists and fundamentalists. What may be done to maintain the American

193. ## Management

o Differentiate between management and leadership. o Describe the roles and responsibilities that organizational managers and leaders play in creating and maintaining a healthy organizational culture. o Evaluate the affect of globalization and management

194. ## english

"All the world is a stage, and all the men and women merely players." metaphor?

195. ## Physics - Eqilibrium position of a spring-ball

A 275g ball is resting on top of the spring that is mounted on the floor. You exert a force of 325N on the ball and it compresses the spring 44.5cm. If you release the ball from the position, how high above the equilibrium position of the spring-ball

196. ## physics

An ant walks on a piece of graph paper straight along the x axis a distance of 10.0 cm in 2.20 s. It then turns left 30.0 degrees and walks in a straight line another 10.0 cm in 1.90 s. Finally, it turns another 70.0 degrees to the left and walks another

197. ## economics

1. Consider the following four debt securities, which are identical in every characteristic except as noted: W: A corporate bond rated AAA X: A corporate bond rate BBB Y: A corporate bond rated AAA with a shorter time to maturity than bonds W and X Z: A

198. ## Chemistry

How is the solubility of a solid affected by temperature?

199. ## physics

A water slide can be thought of as being frictionless. Let's say a slider starts from rest and goes down a slide that is 30 m long and is set at a 25 degree incline. a) Determine the speed of the slider at the bottom of the slide. b) Explain why you don't

I'm a number using only 5 base ten blocks between 150 and 250, and the number in the tens place is half the number in the ones place

201. ## physics

A cart starts from position one with a velocity of 17.0 m/s. Find the speed of the cart at positions 2 and 3 ignoring friction. will the cart reach position four? position 2= 12.0 m high position 3= 2.0 m high 4= 20.m high

202. ## Statistics

In a random sample of 50, the average is 3987 with a population standard deviation of 630. How can one find the 90% confidence interval of the true mean?

203. ## 3rd math

Jake says adding 0 does not change a number. Is he correct? explain

204. ## IPC

The type of bond formed by shared electrons is ____. covaletn, right?

205. ## math

You type four letters to four different people and address the envelopes. If you then insert the letters into the envelopes randomly, what is the probability that exactly three letters will go into the correct envelopes? 1/2 1/3 1/4 0 Explain your answer.

206. ## writing

Part II: Write one paragraph explaining the key differences between the four types of writing (summary, analysis, synthesis, and evaluation). Underline the topic sentence in the paragraph.

207. ## math

What models can be used to help explain the concepts of addition and subtraction of rational numbers? What are the benefits to using such a model? What limitations does the model have? Create an addition or subtraction problem and demonstrate how the model

208. ## Calculus

If 3 x2+ 5 x + xy = 3 and y( 3 ) = −13, find y′( 3 ) by implicit differentiation.

209. ## Calculus

Gravel is being dumped from a conveyor belt at a rate of 50 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal to each other. How fast is the height of the pile increasing when the

210. ## Statistics

Machines are used to pack sugar into packets supposedly containing 1.20 kg each. On testing a large number of packets over a long period of time, it was found that the mean weight of the packets was 1.24 kg and the standard deviation was 0.04 Kg. A

211. ## Accounnting

Vannoy Corporation will invest \$25,000 every January 1st for the six years (2010-2015). If Wagner will earn 12% on the investment, what amount will be in the investment on December 31, 2015? A) \$102,785 B)\$115,120 C) \$202,880 D) \$227,225

212. ## math

domain of f: any real number domain of g: any real number except x is not equal to zero domain of fog: any real number except x is not equal to zero please explain the domain in binary form. thanks.

Can someone please let me know if I am right on these True/ False questions. I like to make sure that I am understanding this information. Thanks in advance for your help ;-) 1. Journalism has professional values of striving for subjectivity, currency,

214. ## chemistry

How many moles of NaI are produced with 3.27 moles BiI3?

215. ## physics

Two force vectors F1 = (2.5 N) x - (3.0 N) y and F2 = - (6.0 N) x + (4.8 N) y are applied to a particle. What third force F3 would make the net, or resultant, force on the particle zero? Magnitude ___ N Direction ___° (from the +x axis)

216. ## 6th grade social studies

What do the arabian and anatolia or anotolian peninsula connect?

What does the sinai peninsula connect?

218. ## Chemistry 106

What are the elements used to make the ingrediants of each category (the same element may be listed in several categories, but a maximum of once in each of the 6 categories, no matter how many different ingrediants it may be in)? **name of the element with

219. ## Chemistry

Need help with this-- 36. Balance this equation using coefficients. Fe + O2 --> FeO (the 2 is small) Thanks -MC

220. ## world religions

Is there any website that can give me a summary of the first second third and the ninth teachings of the Bhagavad Gita? (Arjuna's dejection, Philosophy and spiritual discipline, and Discipline of action, and the Sublime Mystery) It would help a lot!

221. ## MATH HELP NOW

We are doing solving polynomials using the zero factor property and here is the question: Marie has a rectangular board 18 inches by 23 inches around which she wants to put a uniform border of shells. If she has enough shells for a border whose area is 282

222. ## Chemistry--bobpursley

37. Write a balanced equation for this: Magnesium + Chlorine ---> Magnesium Chloride Is it Mg + C12 ---> MgC12 ? Thanks -MC

223. ## physics

Please Help.... A car (mass = 1170 kg) is traveling at 43 m/s when it collides head-on with a sport utility vehicle (mass = 2460 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility

224. ## language and arts

i have a hard time in languages and arts

225. ## Chem

A 11.9-g sample of a gas has a volume of 5.25L at 30 degrees celsius and 762mm Hg. If 2.4g of the same gas is added to this constant 5.25-L volume and the temperature raised to 64 degrees celsius, what is the new gas pressure?

226. ## biology

which region produce the most fish A the Indian ocean B the Atlantic ocean C the pacific D the Atlantic an Indian ocean e none above

227. ## Math

Does 'using the unit circle' just mean that I use these: In Quadrant I, theta=beta In Quadrant II, theta=180-beta In Quadrant III, theta=180+beta In Quadrant IV, theta=360-beta Because the whole lesson we did was about that sort of thing, which is all

Need help with inequalities and graphing them on a line graph!!!!

229. ## Math

A spider crawls at a speed of 1.17 miles per hour , at this rate how long will it take the spider to crawl 3/4 mile?

230. ## maths

A bond with face value of \$500 redeemable at par in 13 years time, is paying interest at j2 = 9.0%. Find the purchase price of the bond to give a yield to maturity of j2 = 8.4%.

231. ## Calculus

Find the linear approximation L(x) of the given function at a, and use it to approximate the function value at the given x-value. f(x)=x^(1/3), a=-27, x=-28 I found the derivative to be f'(x)= 1/[3(-27)^(2/3)] but it does not exist because a number cannot

232. ## Biology

It is said that high temperatures inactivate catechol oxidase. How is it then that some Archaebacteria live in the hot springs of Yellowstone Park at temperatures as high as 73%.

if 8 ciybters are ib wgike, then wgat us half? i f9 counters te one hole, then what is one /third ?

234. ## calculus

At noon, ship A is 20 nautical miles due west of ships B. Ship A is sailing west at 18 knots and ship B is sailing north at 20 knots. How fast (in knots) is the distance between the ships changing at 6 PM?

235. ## IPC

copper and chlorine are likely to form a metallic bond, right?

236. ## math

BLIND BATS AT HALLOWEEN There were number of bats in a cave. Two bats can see out of right eye, Three bats can see out of left eye, Four can't see out of left eye, and Five can't see out of right eye. What is the least number of bats in the cave & what

237. ## Physics

A two-stage rocket moves in space at a constant velocity of 5100 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity of the 1250-kg upper stage is 5520 m/s in the same

asked by Velocityof two stage rocket
238. ## Geometry

How would you solve v=PIr2h? Solve for h? I have no clue how to do this.. Please help thanks -Allyson

239. ## project management

"The psychological contract between an individual and the organization for which they work is a complex one, but is basically a process of reciprocation". Discuss the above statement and explain how the type of psychological contract offered by the Project

you invest \$1500 for three years.find the amount you earn at an annual rate of 8.25%

241. ## physics

if a bus fell off a cliff at a speed of 27m/s & the cliff is 70m high how far from the bottom do they land?

242. ## physics

A plane can fly at Mach 1.47, which means the speed of the plane is 1.47 times the speed of sound in air. What is the angle between the direction of propagation of the shock wave and the direction of the plane's velocity? How is the answer 47.1 degrees

243. ## Math

Find the requested value. f(-4)for f(x)={6x, if x ¡Ü -1 f(-4)for f(x)=x - 2, if x > -1

244. ## english

Criticism is always uncomplimentary. true?

245. ## english

"All the world is a stage, but the play is badly cast." its a simile write? or is that a metaphor??

246. ## com156

What should you consider when looking for helpful sources? What are some red flags that indicate you should avoid a particular source?

247. ## math

a jetliner is crusing at an altitude of 31,680 ft. What is the altitude in miles? Show work by using demensional analysis.

248. ## algebra

What is the inverse of the function y=3^x

Tavarez Company assembled the following information in completing its July bank reconciliation: balance per bank \$15,280; outstanding checks \$3,100; deposits in transit \$5,000; NSF check \$320; bank service charge \$100; cash balance per books \$17,600. As a

250. ## English

With reference to an earlier question:- The liquid is to be scooped at a quarter of the depth of the container it is in. Hence the first sentence is correct? Or is there a better way of phrasing? The liquid should be scooped at a quarter depth of the

251. ## Chemistry

38. Identify the type of reaction. A + B --> AB A + BC --> AC + B Thanks -MC

252. ## physics

A 1.5 kg chunk of ice slides down a roof sloped at a 60 degree angle with the horizontal. If there is no friction, determine the acceleration of the ice. Show that the amount of mass doesn't matter in part a.

253. ## physics

An ant walks on a piece of graph paper straight along the x axis a distance of 10.0 cm in 2.20 s. It then turns left 30.0 degrees and walks in a straight line another 10.0 cm in 1.90 s. Finally, it turns another 70.0 degrees to the left and walks another

254. ## Science

the small cylinder of a hydraulic press has an area of 2"(squared). If a force of 10# is applied to the small piston, how much is the pressure within the larger cylinder increased, according to pascal's principle.

255. ## Science

assume the pressure is kept constant if the volume of a gas quadruples, how does the absolute temperature change?

256. ## Science

if the large piston of a hydraulic press has an area of 60"(squared), what will be the total force upon it if a pressure of 15 psi is produced by the small piston?

257. ## Chemistry

37. Write a balanced equation for this: Magnesium + Chlorine ---> Magnesium Chloride Is it Mg + C12 ---> MgC12 ? Thanks -MC

258. ## geometry

Given the right triangle JKL, whose arean is 32 sqare units, determine if it is an isoceles right triangle.

259. ## economics

suppose pam owns her own building in chicago, which she could rent for 200000 a year, and used to make 60000 a year managing a bed, bath, and beyond store. she decides to open a surfing store. her yearly sales are 500000, she pays her 2 sales workers 20000

260. ## english writing

how would you say "as a result" in other words? Im writing a report and I cant repeat all the time as a result of the meeting...

261. ## Physics

I tried working this out and I got 495 which is wrong. im not sure what to do. A two-stage rocket moves in space at a constant velocity of 4650 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the

262. ## MATH-STUCK

Express each power as an equivalent radical. K. I don't know how to write this, but I'll explain. There is a fraction. 1 over 9. And 9 has a power up to it which is 5 and a power down which is 3. I don't get how to express this power as an equivalent

Case Study: Your long-time friend Carl comes to you with a serious problem in his life. He is a believer, and he wants your advice. For years he and his family have lived above their means. They did this by continually refinancing their house and rolling

264. ## math

in december the average rainfall in all of the deserts is 0.89 mm.USE the figure from the table to write a comparison of average desert rainfall in august and december?

265. ## calculus

This is from our problem set. f(x)= 2(x^3)-3(x^2)-12x+20 write an equation of the line perpendicular to the graph of f at x=0 I think i'm supposed to take the derivate of f and then find the slope of the tangent line at x=0. Then take the opposite

266. ## Chemistry

37. Write a balanced equation for this: Magnesium + Chlorine ---> Magnesium Chloride 40. How many torr equal 760 mm Hg? Please explain how to do these. Thanks -MC

267. ## chemistry

write a balanced net ionic equation fir the reactions that occurred with the metal Mg reacting with Pb2+

268. ## Algebra

Complete the following for f(x)=2^(x+1)-3 Range: Coordinates of y-intercept:

269. ## US History

25. What happened to national attitudes and government policy to cause a dramatic change in immigration from 1921-1926? Thanks -MC

270. ## Chemistry

I realllyy need help with this: 39. Find the formula mass for AI2S3. Show your work. (The 2 and 3 are small) Thanks -MC

271. ## probability

Suppose that the probability is 1 in 3,900,000 that a single auto trip in the United States will result in the death of the driver. Over a lifetime, an average U.S. driver takes 50,000 trips. Assume that events are independent: (a) What is the probability

272. ## Science

Name 6 types of heat creating energy

273. ## algebra 1 b

The sides of a triangle have measures of x, x, and y, and the perimeter of the triangle is 46. The measure y is 4 centimeters longer than the measure x. Write the solution for this as an ordered pair.

274. ## Chemistry

I made a graph and i used line of best fit. How do i find the slope of the line?

275. ## english

the main character in a story is the antagonist? True?

276. ## Physics

A 10 kg ball moving due west at 2m/sec collides with a 4kg ball that is moving due east at 3 m/sec. You determine that immediately after the collision the 10 kg ball is moving due west at 0.57 m/sec. How do I set up the equations to find the answer?

277. ## Chemistry (electron config)

Write electron configurations for the following ions. Tl^+ [Xe]4f^145d^8 is that correct?

278. ## Phsyics - QUICK QUESTION

what is the the effect on acceleration of increasing the mass of the cart without increasing the force that is causing the acceleration

279. ## English

satirical quotes from midnight's children and The God of Small Things

280. ## Algebra

One can think of "a out of b" without actually removing the pieces. For example, one might think of the fraction of Xs in the diagram X X O O O as "two Xs out of five objects," in which case 2/5 of the objects are Xs. Can you apply this way of thinking to

281. ## Science-Organelle

What is the structure of chromatin?

282. ## math

find the n. 4 x n = 9 + 3. what do i do?

283. ## Math (money)

How much money is in 350 nickles?

284. ## Math

how to use prime factorization using Square Root??? Examples Plzz like 3 examples

285. ## physics

A certain freely failing object requires 1.70 s to travel the last 39.0 m before it hits the ground. From what height above the ground did it fall?

286. ## bioethics

I need to create a political cartoon about clinical trials. I have no idea what to do. Any suggestions would be greatly appreciated.

287. ## Chemistry

When 0.578 L of Ar at 1.20 atm and 227°C is mixed with 0.299 L of O2 at 501 torr and 127°C in a 400. mL flask at 27°C, what is the pressure in the flask?

288. ## science

Which of the following chemical reactions is written to show that mass is conserved? A H2O to H2+O2 B CH4+202 to CO2+2H2O C Mg+HCI to 3MgCI0+H2 D N2+H2 to NH

289. ## sentences with all kinds of errors

Recent economic concerns prompted President Obama to meet with credit card industry executives in April 2009. The national credit card delinquency rate has continued to grow in recent times, and the president, along with Congress, aims to end unfair fees

290. ## math

Need help with factoring this problem. Just want to make sure I followed the right steps. X^3-2X^2-X+2 there are four terms so i used grouping method X^2(X-2)(-1)(X-2) (X-2) (X^2-1) (X-2) (X-1) (X+1) Correct?

291. ## Chemistry

A first-order reaction has rate constants of 4.6 x 10^-2 inverse seconds and 8.1 x 10^-2 inverse seconds at 0 degrees C and 20 degrees C respectively. what is the value of the activation energy? Please show all steps!!

292. ## math

2=sq root of 2U+7 - sq root of U

an example of PEST analysis please

294. ## 5th grade word problem

a customer at a cider farm has a 5 gallon jug and ask the farmer to put in exactly 4 gallons. All the farmer has to measure out the gallons is a 3 gallon jug. In what way or ways could the farmer measure out exactly 4 gallons using just these two

295. ## math

rationalize 3/7-root3 would it be 21+3root3/46

296. ## Chemistry

How would I find the moles of H+ if I have 2.0 M HCl and 2.0 M NaOH solution?

297. ## Chemistry

27. Amorphous solids have crystal structures.- F? 32. Pure, crystalline solids freeze and melt at the same temperature.- F 34. Water expands as it freezes.- T Thanks -MC

298. ## Statistics

In a sample of 171, the mean is 58 with a population standard deviation of 4.8. Can someone help me figure out what is the 90% confidence interval of the true mean? Thank you.

299. ## social studies

A likely question (or request for information) that you'd probably hear during a behavioral interview would be: "Describe your worst behavioral traits." "Describe your best behavioral traits." "Explain to me how you handled a customer emergency." "What

300. ## physics

Two force vectors F1 = (2.5 N) x - (3.0 N) y and F2 = - (6.0 N) x + (4.8 N) y are applied to a particle. What third force F3 would make the net, or resultant, force on the particle zero? Magnitude ___ N Direction ___° (from the +x axis)

301. ## English

The liquid should be scooped at a quarter depth. or The liquid should be scooped at a quarter depths. Which is correct?

302. ## 3rd math

Reasoning does (4+5)+2 = 9+2? Explain Thanks

303. ## english

Part II: Write one paragraph explaining the key differences between the four types of writing (summary, analysis, synthesis, and evaluation). Underline the topic sentence in the paragraph.

304. ## college

the perimeter of a rectangular garden is 25.6m and the area is 36.12msquare. find the length and width of the garden

305. ## math

Use common denominators to compare the pairs of rational numbers. In each of the following identify which one is greater and explain how you know. 5/7, 5/8

What types of cells in your body are no longer undergoing mytosis?

307. ## English

Comparison of the Satirical quality in the novels of Rushdie and Roy

308. ## Math

please go step by step to better understand if 2f(x)+f(1-x)=x^2 for all real numbers, the f(x)=?

309. ## 5th grade social studies

Question: What time period or movement began in the textile industry? I am really confused about this questions. My answer was the time period of the 18th century. Is this correct? Question: What is an economic system based on machinery rather than animal

310. ## college Physics

A disk with a mass of 1300 g and radius 0.7 m has a block of mass 170 g hanging from it, as shown. The wheel and block start at rest. The moment that the block is released, what is the magnitude of the angular acceleration of the disk? (Note: the moment of

311. ## Physical Science

an airplane is flying at 600km/h at an altitude of 2.0km. When the sound of the airplane's engines seems to someone on the ground to be coming from directly overhead, how far away is she from being directly below the airplane?

312. ## Chem

The question is; About Fe+2 concentration will Fe(OH)2 precipitate from a buffer solution that has a PH = 9.29? The Ksp of Fe(OH)2 is 4.87x10^-17 So here is what I did, Ksp = (x) (2x)^2 = 4x^3 4.87x10^-17 = 4x^3 x = 2.30x10^-6 I don't know what do I have

313. ## Gen Chem 1

We want to change the volume of a fixed amount of gas from 745mL to 2.30L while holding the temperature constant. To what value must we change the pressure if the initial pressure is 102 kPa?

314. ## Government

Im sorry for asking another question but is their a website where i can find what provisions in the constitution ensure that each of these purposes is achieved? -form a more perfect union -establish justice -insure domestic tranquility -provide for the

315. ## math

a package of 6 stickers costs \$1.50. Which equation can be used to find t, the total cost to give a sticker to 300 childeren? A. t = 9 x 300 B. t = 0.25 x 300 C. t = 0.25 x 50 D. t = 9 x 50 ?

316. ## Western Experience : Since the sixteenth century

How did imperialism impact non-western economies? How did Europeans achieve these transformations of local economies? What were the effects of those transformations?

317. ## social studies

What did the Gadsden Purchase have on American democracy?

318. ## Algebra check+help?

For problems 1 and 2 write Y as a function of X 1) 12=9x+3y - I think you would subtract 9 from the 12.. but I'm not really sure because you can't add/subtract x's and y's from regular numbers. 2) -2x+3y=9 Same problem as above.. Can someone please explain

319. ## math

3^2 is my sample but it says explain their funcutions for eachother. what exactly does it mean. can you give me a function for my problem.

320. ## Biology 101

Summarize the inheritance of sex-linked traits through meiosis and how it relates to genetics.

if angele O is 31 degree and angle T is 121 degree and what is angle A will be ______?

322. ## Math

explain how you could show five less than a number using an expression?

If someone could please let me know if these multiple choice questions are right? I believe they are but I want to make sure! Thanks for the help in advance! 1. Critical readers watch television by deciding that their primary purpose for choosing shows is

324. ## Physics

Skydiver Joseph Kittinger, record for the longest jump, reaches a terminal speed of 60m/s with his arms and body fully extended. Then, he switches to a head first dive, reducing his cross section area by 80% (that is, his cross section area when head-first

Can you simplify 9 over 16?

326. ## math

mrs.!@#\$%^&hs has 40yd of fencing to use to make a rectangular area for her garden.(she wants to keep the animals out!!!!) she pans to use part of the 26yd wall of her house as one of the sides of the rectangular area. - what whole dimension( lengh and

327. ## algebra 1

help please this question is driving my crazy. Suppose there is a 2-degree drop in a temperature for every thousand feet that an airplanes climbs into sky. If the temperature on the ground is 65 degrees, what would be the temperature when the plane reaches

328. ## math

please go step by step to better understand if x,y,z are three different real numbers with y/x-z=x+y/z=x/y, evaluate x/y

329. ## chemistry

Why did i get this question wrong? its about a u shaped tube with a simepermeable membrane 0.3 M Fe (NO3)2 0.5 M sugar 0.1 M NaCl So I did this: 0.3 x3 = 0.9 0.5x1=0.5 0.1x2=0.2 = 0.7 so i chose the answer increase in the water level to the left side of

330. ## math

A company wants to make 16 equal payments for a new computer that cost \$2,229.99 and for a fax machine that cost \$109.99 including tax. What is a resonable estiamte for each payment?

331. ## math

A company wants to make 16 equal payments for a new computer that cost \$2,229.99 and for a fax machine that cost \$109.99 including tax. What is a resonable estiamte for each payment?

332. ## Western Experience

in what ways did the alliance system, implemented to maintain a peaceful balance of power in Europe, in fact have the opposite effec?

333. ## physics

How much work will a net force of 56·N west do on the cart as it moves 1·m?

334. ## Physics

An object of mass 1.25 kg on a flat surface has two forces acting on it, F1 and F2 in the horizantal direction. F1 acts in the positive direction, F2 acts in the negative direction. The magnitude of F1 is 26.75 N. The object moves strictly along the

335. ## chemistry

a little help please? Anyone? can someone explain to me the trend in radii of O2-, F-, Na+, and Mg+

i need help my teacher give us adjective worksheet about spookley the square pumpking i need to write 6 adjective to describe spookley the square pumpkin. 1.little 2.square 3.kind 4.friendly 5.thankful 6.hopeful

337. ## Geography

How do you calculate Latitude and longitude precisely?

338. ## Science

PLEASE HELP Science Test Friday Study Guide? I have 1 to 22 already but I am stuck now I have to have this completed and correctly for my study guide. I have a C right now I need an A on this test to bring it up to a B or I stay on restriction please help

339. ## chemistry

a copper block has a mass off 80 grames and occupies a volume of 9.5cm3 calculate its density

340. ## Calculus

When air expands adiabatically (without gaining or losing heat), its pressure and volume are related by the equation where is a constant. Suppose that at a certain instant the volume is cubic centimeters and the pressure is kPa and is decreasing at a rate

find the radius of circle circumcribed about traingle has 3 known sides

342. ## social studies

How did the aquisition of the Oregon Country affect American Democracy?

343. ## math

Simplify, then apply the rules of limit to evaluate lim x3-5x2+6x/x2-9 x->3

344. ## spanish

can someone proof my essay

345. ## math

5/11+root5 How would I rationalize this I think it would be - Multiply both sides by 11-root5 then use the foil method on the denominator to give you 55-5root5/121+5root11-5root11-5 the 2 roots would cancel out giving you 55-5root5/12-5 so would the answer

346. ## Biology

Hi, I am doing my lab assignment about Protein Analysis. Our job is to find the concentration of the casein protein in our original Unknown sample with the initial volume of 2ml. So after plotting the graph of the data given, we are supposed to find the

347. ## chem

Excess Ag+ is added to 50 mL of NaBr soln and precipitated out 22.8 mg of AgBr. What is the original concentration of Br- ion in the solution in ppm?

348. ## Math

There are 1760 yards in a mile. A certain wheel makes 17600 revolutions in 40 miles. What is the number of yards in the radius of the wheel?Give the answer as a decimal to the nearest tenth of a yard.

349. ## sentences with all kinds of errors

Recent economic concerns prompted President Obama to meet with credit card industry executives in April 2009. The national credit card delinquency rate has continued to grow in recent times, and the president, along with Congress, aims to end unfair fees

350. ## geometry

At the beginning of a run on a road that goes due north, Hayden noticed that she was 4 kilometers south of a dead douglas fir. If the midpoint of her jog was 7 kilometers north of the dead douglas fir, how far did Hayden have to travel? ---thanks :]

351. ## health care finance

Assume a for-profit health system has \$1 million in taxable income for 2007, and its tax rate is 30 percent. What is the firms net income?

352. ## Algebra

What is the inverse of the function y=3x

353. ## Management

o Differentiate between management and leadershipwithinKraft Foods Ijustneedsome links to goto to find info where Ican do a 2,100 word essay

354. ## Earth/Environmental Science

"Tsunamis" are giant waves caused bhy earthquakes under the ocean floor. They _______ islands and coastlines. What does tsunamis do to islands and coastlines?

355. ## 5 th math

sorry, i was to sleepy my type got mess up. my question is if 8 counters are one whole, then what is half? if 9 counters are one whole, then what is one/third? please help my last one. !!

356. ## math

Find all real and Imaginary solutions 7x^(3)+70x^(2)-x-10=0

Determine the selling price of a 15-year, 4.725% bond, with \$1000 maturity value, with a yield of 4.735%. (Assume twice-yearly interest payments. Round your answer to the nearest cent.) PV = \$ 1

358. ## social studies

what is the hemispheres of Nebraska/

359. ## math

mrs.!@#\$%^&hs has 40yd of fencing to use to make a rectangular area for her garden.(she wants to keep the animals out!!!!) she pans to use part of the 26yd wall of her house as one of the sides of the rectangular area. - what whole dimension( lengh and

how do you solve c=3d-27 ; 4d+10c=120

IS IT POSSIBLE FOR COMPANIES BOTH TO MAXIMIZE FINANCIAL VALUE FOR SHAREHOLDERS AND TO ACT IRRESPONSIBLY IN THE COMMUNITIES IN WHICH THEY OPERATE,TO TREAT THEIR EMPLOYEES,CUSTOMERS,AND SUPPLIES WELL, AND TO ENGAGE IN ACTIVITIES THAT ARE GOOD FOR THE

362. ## math

How do I take the derivative in respect to c1 for the following utility function? u1 = log(c1) + log [1/2(x-c1-c2)] details please

363. ## physics

A 3.00 10^2 N force is pulling an 80.0 kg refrigerator across a horizontal surface. The force acts at an angle of 18.0° above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 8.00 m a) Find the work done

364. ## math

how you turn decimal to fraction or mixed number?

366. ## Money and Banking

One year ago, you bought a bond for \$10,000. You received interest of \$400 at the end of the year, as well as your \$10,000 principal. If the inflation rate over the last year was five percent, calculate the real return.

367. ## Science

if a pressure of 10 psi on a volume of 5"^3 is reduced to 2 psi, by what factor does the pressure change?

368. ## physics

What was the initial kinetic energy of the small mass before the collision? What is the kinetic energy of the two-mass combination after the collision?

369. ## math

2. Grace is m inches tall and Grant is n inches tall. What is the difference in their height expressed in feet?

370. ## math

Is it possible to have a triangle that the sum of the measures of the small and medium sides is equal to the measure of the large side?

371. ## math

find x x-5/x-2 = x-9/x-7 Method (x-5)(x-7) = (x-9)(x-2) x^2-12x+35 = x^2-11x-18 I get stuck here help would be must appreciated

175104000 is 7 10ths of population what is the population

373. ## Math

Predictable Corp has increased its annual dividend each year of its life by 2% (and will continue to do so indefinitely). If Predictable paidits annual dividend yesterday of \$8 and the required return is currently 4%, then by what amount will the stock

374. ## MATH

Find the product 3[x-(- 1/3+2iã14/3)][x-(-1/3-2iã14/3)]

375. ## geometry

Is it possible to have a triangle that the sum of the measures of the small and medium sides is equal to the measures of the larger?

376. ## math

Use Descarte's rule of signs to discuss the possibilities for the roots of the equation. Do not solve the equation -5r^(4)+6r^(3)+9r-15=0

explain how you can use the basic fACT FOR 9+6=15 TO SOLVE THE NEXT EQUATION

378. ## math

x(x-3)+4= 3x^2 - 2(x+8) Divided by 3

379. ## Math

x(x-3)+4= 3x^2 - 2(x+8) 3

380. ## English

Can you please check the following sentences? Thank you. 1) My mum is an employee. She works for a confectionary industry. 2) I like spending time on the net (better: I like surfing the net). I like playing on my PlayStation. I also like going out with my

381. ## math

triangle with vertices A(-2,2), B(4,0) and C(-2,-3). find the length of this altitude

What are the two similar features for long shore current and rip currents?

383. ## English

When I type President Bill Clinton in a sentence does president need to be capitalized?

384. ## biochemistry

all three sugars have the formula C6H12O6. what does this reduce to

385. ## ap calculus bc

Hi! Thank you very much! My question is: how do you find the antiderivative of 1 / (square root[1-(x^2)]) aka antideriv( [1/(x^2)] ^ -1) THank you!!

386. ## Government

I have a journal activity i have to turn in asap, is their any websites were i could find the reasoning why the 'framers' of the Constitution put in these purposes of the government? -form a more perfect union -establish justice -insure domestic

387. ## math: calculus

Having a problem with this one... if f(x)=f, then find f(7)

388. ## science

a shell has an initial velocity of 450 feet per second, what is the maximum height the shell reaches?

389. ## math

I'm thinking of a number made from the digits 3,6 and 9. Each digit is used only once. My number is an even number. My number is greater than 400. What is my number?

390. ## math

how to solve 3[x-(- 1/3+2iã14/3)][x-(-1/3-2iã14/3)]

391. ## math

thanks reiny for the help but can u tell me the domain of f g and fog in binary form? thanks

392. ## English

Need help with topic "Justice" Need 2 question: is what is the moral aspect of Justice? Research plan: Have investigate my question. I am kind stuck on this topic, please help me to write 3 pages. Thanks.

393. ## health

compare and contrast contributory negligence with comparative neglience.

394. ## Chemistry

why is flame test for chemicals important? give me reasons

x^2-6x(3-6x)

396. ## Math

Howto use perfect square inside of a imperfect square when finding the square root.?

397. ## math

Our teacher gaves us a rational graph and we are supposed to determine its equation, there is more than one answer. So the aymptotes are vertical= x=-5 and x=2 horizontal asymptote= y=2 then there is a cubic function that crosses the x-axis at -2,0 and the

398. ## us history115

in waht ways did democracy create a new political culture? how did democracy impact social change?

399. ## math

if the bases are not the same or the exponents why would it not work?

400. ## Math - derivative of f(x) (check)

f(x) - x/(x-1) then f'(x) = -1/(x-1)^2 is that correct?

401. ## Math Algebra

3/2x+3 - 5/x-7 + x^2-x/2x^2-11x-21

402. ## 3rd math

9 + 3 = ? + 9

403. ## MATH

what is the fact of 2x^2+34x-141

(2x^3)-2 3

405. ## 4 th grade math input outout box

how do you get from 6 to 40

406. ## precal

find all values of x such that sin(sin(x))=1

407. ## math

how do we deal with ratio give some example

408. ## math

find each quotient. 3/4 divided by -12