# Questions Asked onNovember 13, 2010

1. ## AP Physics

A pole-vaulter approaches the takeoff point at a speed of 9.50 m/s. Assuming that only this speed determines the height to which he can rise, find the maximum height at which the vaulter can clear the bar.

2. ## chemistry

A 1.20-L container contains 1.10 g of unknown gas at STP.What is the molecular weight of the unknown gas?

3. ## physics

A 40%-efficient car engine accelerates the 1300 kg car from rest to 20 m/s How much energy is transferred to the engine by burning gasoline? .

4. ## Chemistry

What is the balanced net ionic equation for the following reaction: 2 NH4Cl + Ba(OH)2 = 2H2O + BaCl2 + 2 NH3 i got 2NH4^+ +2OH- = 2H2O + 2NH3 but it keeps telling me i'm wrong

5. ## AP PHYSICS

A gymnist is swinging on a high bar. The distance between his waist and the bar is 1.1 m, as the drawing shows. At the top of the swing his speed is momentarily zero. ignoring friction and treating the gymnist as if all his mass is located at his waist,

6. ## Physics

A ball (mass = 250 g) on the end of an ideal string is moving in circular motion as a conical pendulum. The length L of the string is 1.92 m and the angle with the vertical is 37 degrees. A) What is the magnitude of the torque (N m) and direction (from the

7. ## ochem

A sample of Limonene has a specific rotation of +76.9. What is the % ee and molecular composition of this sample? R(+)- is +125.6 and S (-)- 122.1. I'm confused I don't know whether I should divided by 125.6 or 122.1. %ee=(76.9/125.6)*100=61%. Is this

8. ## physics

The label on a candy bar says 410 Calories.Assuming a typical efficiency for energy use by the body, if a 74kg person were to use the energy in this candy bar to climb stairs, how high could she go?

9. ## college

A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of cyclopropane in the mixture is 334 mm Hg and the partial pressure of the oxygen is 1.02 atm, what is the total pressure of the mixture in torr?

10. ## Physics

A puddle of water (n = 1.33) is covered with a very thin layer of light oil (n = 1.20). What is the minimum thickness the oil in the region that does not reflect light with a wavelength of 550 nm?

11. ## statistics

The weight of corn chips dispensed into a 19-ounce bag by the dispensing machine has been identified as possessing a normal distribution with a mean of 19.5 ounces and a standard deviation of 0.1 ounce. Suppose 100 bags of chips are randomly selected. Find

12. ## general chemistry

I need the oxidation half reactions, reduction half reactions, and net ionic equations for the following reactions: 1)magnesium +0.1M zinc sulfate 2)copper+0.1M zinc sulfate 3)zinc+0.1M copper(II)sulfate 4)zinc+3M HCl 5)copper+3M HCl 6)0.1M potassium

13. ## Algebra

One canned juice is 20% orange juice: another is 10% orange juice. How many liters of each should be mixed together in order to get 10L that is 13% orange juice.How many liters of the 20%? How many liters of the 10%?

14. ## 1

A 3.00-kg particle has a velocity of (3.00 - 4.00 ) m/s. (a) Find its x and y components of momentum. (b) Find the magnitude and direction of its momentum.

15. ## physics

An "energy bar" contains 22g of carbohydrates. If the energy bar was his only fuel, how far could a 68 kg person walk at 5 km/hr ?

16. ## Physics

A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. The thrust of its engines is 2.1 105 N. In being launched from rest it moves through a distance of 87 m and has a kinetic energy of 3.8 107 J

17. ## Chemistry

Use the given data and calculate the enthalpy change for the following: a) B2O3(s)+3COCL2(g)--->2BCL3(g)+3CO2(g) b)Hg(l) +2Ag+(aq)--->Hg2+(aq)+2Ag(s) compound: B2O3(s) COCL2(g) BCL3(g) CO2(g) Ag+ (aq) Hg2+ (aq) Delta H (standard circle)f kj/mol -1272.8

18. ## bus475

One characteristic of an oligopoly market structure is:

19. ## Calculus

Use implicit differentiation to show dy/dx = [(1-xy)cot(y)]/[x^2 cot(y) + xcsc^2(y)] if xy = ln(x cot y).

20. ## physics

An "energy bar" contains 5.6g of fat. a)How much energy is this in joules? b)How much energy is this in calories? c)How much energy is this in Calories?.

21. ## homework

please help me with this...a box with a square base and an open top must have a volume of 32,000 cm^3. find the dimesinions for the box that minimize the amount of material used.

22. ## economics

A monopolist faces an upward-sloping marginal cost curve. Its profit-maximizing quantity will be a. at the minimum point of the marginal cost curve b. less than the (total) revenue-maximizing quantity c. equal to the (total) revenue-maximizing quantity d.

23. ## chemsitry

What is the formal charge on each of the atoms in the Lewis structure of the PO4 (-3) charge? Draw another possible Lewis structure of the phosphate ion below. Formal charge on P is ? -how do I do this problem.

24. ## statistics

To win at BIG GAME in a certain state, one must correctly select 6 numbers from a collection of 49 numbers (1 through 49). The order in which the selections is made does not matter. How many different 6-number selections are possible, assuming no

25. ## Math

Amy is charged 12% annual interest compounded monthly on the unpaid balance of a \$2000 loan. She did not make any payments for 2 years. Her friend said the amount she owed had more than doubled, is that true? how much does she owe?

26. ## Chemistry

1. What happens to the temperature of water when 10J of energy are added if you have 10.00g of water? 2. What happens to the heat of the water if the temperature is cooled from 25.0 degrees celcius to 10.0 degrees celcius if you have 10.00g of water?

27. ## Physics

A gun is accurately aimed at a dangerous criminal hanging from the gutter of a building. The target is well within the gun’s range, but the instant the gun is fired and the bullet moves with a speed v(sub0) , the criminal lets go and drops to the ground.

28. ## physic

a SHO has a maximum speed of 5m/s. How fast will it be going when the potential energy is seven-ninths of the kinetic energy.

29. ## chemistry

what is the number of mole equivalents of H2 produced by the reaction of 1 mole equivalent of Mg (m) with H2SO4 (aq)?

30. ## math

Inflation is running 2% per year when you deposit \$1000 in an account earning interest of 13% per year compounded annually. In constant dollars, how much money will you have two years from now? (Hint: First calculate the value of your account in two years'

31. ## Math

State different situations that do not involve money in which a formula like the one for compound interest is used. In each case, state a related problem and write its solution.

32. ## chemistry

Predict the molecular and bond angle for each molecule or ion given below: SO3, ClO3-, NF3, SO42-

33. ## physics

A 1.2 kg cannon ball is shot off a platform (1) at 10 m/s. It hits a platform (2) and begins to roll without bouncing. The coefficient of friction between platform (2) and the ball is .3. How far does the ball land from platform (2)? How long does it take

34. ## Math (hard)

Postcard stamps are 20 cents each, while letter stamps are 33 cents each. If you have 50 stamps worth \$12.60, how many of each type do you have? I don't even know where to begin with this Q.

35. ## Algebra 2

The sum of the digits of a two-digit number is 9. If the digits are reversed, the new number is 27 more than the original number. Find the original number. I hate silly word problems like this, please help me out.

36. ## social studies

Who is the richest person in Paraguay? Thanks!

37. ## phyics

a SHO has a maximum speed of 5m/s. How fast will it be going when the potential energy is seven-ninths of the kinetic energy.

38. ## physics

a 1300 newton crate slides 14 meters down a ramp that makes an angle of 30 degree with the horizontal. if the crate slides at a constant speed, how much thermal energy is created?

39. ## calculus

use the definition of the derivative to calculate f'(x), if f(x)= SQRT(2x) and find the equations of the tangent line and the normal line to the graph of f at x=2

For the following reaction, it is found at equilibrium at a certain temperature that the concentrations are [CO(g)] = 2.7 multiplied by 10-4 M, [O2(g)] = 1.9 multiplied by 10-3 M, and [CO2(g)] = 1.1 multiplied by 10-1 M. 2 CO(g) + O2(g) reverse reaction

41. ## college

Contrast utilitarian and deontological approaches to a dilemma involving a potential employee liberally enhancing (lying on) her resume.

42. ## ochem

A sample of Limonene has a specific rotation of +76.9. What is the % ee and molecular composition of this sample?

43. ## Humanities

What are the different forms of social media that exists today?

44. ## chemistry

1.00 mol of A and 2.00 mol of B are placed in a 5 Liter container. after equilibrium has been established, .50 mol of D is present in the container. What is the equilibrium constant, Kc? A + 2B 2C + D

45. ## economics

what are the theories of david mcclelland?

what is 35% 440

47. ## Communication

What are the roles of summarising

48. ## ochem

when the concentration of CHBr3 and NaOH are both .145, the rate of the reaction is .0040 M/s. What is the rate of the eaction if the concentration of CHBr3 is doubled?if the conc. is halved?if the two conc. are both increased by a factor of five?

49. ## chemistry

A sample of only solid ammonium chloride was heated in a 1 L container at 500 C. At equilibrium, the pressure of NH3 (g) was found to be 1.75 atm. what is the equilibrium constant, Kc, for the decomposition at this temperature? R= .08206 L atm/K Mol NH4CL

50. ## chemistry

what is the [H3O+] of a solution that is .01 M in HOCl and .03 M in NaOCl?

51. ## chemistry

If 100 mL of .03 M HCL solution is added to 100 mL of buffer solution which is .1 M in NH3, and .1 M in NH4Cl, what will be the pH of the new solution?

52. ## chemistry

If solid AgNO3 is slowly added to a solution that is .05 M in NaI and .12 M in NaCl, what is the concentration of I- when AgCl just begins the precipitate? Ksp for AgCl= 1.8 x 10^-10 Ksp for AgI= 1.5 x 10^-16

53. ## ethics

Choose an ethical approach and explain the steps one should take when one discovers that a supervisor is performing a lawful, but immoral act.

54. ## physics

An ideal gas at 20 C consists of atoms 22*10^22. 4.5 J of thermal energy are removed from the gas. What is the new temperature in C?

55. ## English

Scientists found a great way to use flowers for cars. The oil from some flowers can make cars run. 1) It needs a special engine. 2) It uses flower oil to run cars. 3) This is a great way to save money. 4) It also makes the air clean. Now flowers can be

56. ## Intro to life science

I need help finding good resources for research about the Simien Mountains in Ethiopia.

57. ## English

1. We can make empty milk packs into new paper. 2. We can make empty milk cartons into new paper. (Which expression is correct?) 3. We can make pieces of a soap bar into a big soap bar. 4. We can make pieces of bars of soap into big bars of soap. (Which

58. ## English

1. How do you pronounce 'mouths'? (plural form) Can we omit the 'th' sound in normal speech? 2. clothes (We can omit the 'th' sound in this word, right?)

59. ## algebra

6 x (-3) x (-5) x 4

If m

7z - z

62. ## US History

I have to write an essay on this, so can I please get some links to help me? Thanks 52.Discuss the policy of containment and give examples of how the United States supported it. Would you say it was a success? -MC

63. ## algebra

determine the distance betwen the two points (5,12) and (11,-4)

64. ## algebra

(c+g)(c^2-cg+g^2)

65. ## PHYSICS-LAW OF THERMODYNAMICS

A dinner plate drops and breaks. This best illustrates the ______ law of THERMODYNAMICS A. 1st b. 2nd c. 3rd d. 4th I am inclined to say the 1st because energy can be neither created nor destroyed, it can only change forms. Thus the plate falling lost it's

66. ## phys

An observer detects an apparent frequency of 505 hz coming from a 500 hz source. Which is true? a. the observer is moving due east, away from the stationary source b. the source is moving due west, away from the stationary observer c. the souce and the

67. ## Math

A man collected \$28500 on a loan of \$25000 he made 4 years ago. If he charged simple interest, what was the yearly interest rate?

68. ## math

6*(-3)*(-5)*4

69. ## math

help!!! i don't know how to factorize 9x*squared* - 12x +4! HELLLPPPPPP!

70. ## AP Physics

A 60.0 kg skier rides a 2860 m long lift to the top of a mountain. The lift makes an angle of 14.1° with the horizontal. What is the change in the skier's gravitational potential energy?

71. ## Math

5y(squared) + 4 = 14 solve quadratic equations by finding square roots

7z-z can someone please check my answer for the above math question. My answer is 62 is this correct?

73. ## graphing

given one point on the graph (-2/3,(2,5) and the slope, m=-3, develop an equation in te slope intercept format

74. ## AP PHYSICS

A basketball player makes a jump shot. The 0.700 kg ball is released at a height of 1.90 m above the floor with a speed of 7.00 m/s. The ball goes through the net 3.10 m above the floor at a speed of 3.70 m/s. What is the work done on the ball by air

75. ## Biology

Hi can anyone clarify the following please Three unrecognisable bodies are found Genotype of bodies found at a house fire Locus Body 1 Body 2 Body 3 D3S1358 14,19 16,18 14,18 vWA 15,21 18,18 17,21 D16S539 11,11 12,13 11,12 D2S1338 18,19 18,24 18,23 D8S1179

76. ## Physics

A man of mass 65.2 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 22.7 kg and is 2.4 m long. Suppose the man stands to the right from the middle of the scaffold that is a distance one sixth of the length of the

77. ## US History

53. Show how the role of the federal government was viewed by different groups at different times in the 20th century. I don't quite understand what this is saying, and I need to write an essay on this, so can someone explain it to me? Thanks -MC

78. ## chemsitry

calculate Delta H of RXN 2 N2 (g) + 3 H2( g) ->2 NH3 (g)

79. ## Precalc

A woman made \$45,000 during the first year of her new job at city hall. Each year she received a 10% raise. Find her total earnings during the first nine years on the job.

80. ## Physical Science

Object A has a mass of 500g and a density of 5.0g/cm^3; object B had a mass of 650g and a density of 5.6g/cm^3. a. Which object will displace the most liquid? b. Could object A and object B be made of the same substance?

81. ## ELA

How can vampires survive from humans???

82. ## math

find x -x when x= -10

83. ## statistics

A recent report stated "Based on a sample of 250 truck drivers, there is evidence to indicate that, on average, independent truck drivers earn more than company-hired truck drivers." This statement is an example of __________.

84. ## Algebra 2

Solving systems of linear equations in three variables. Ok so i don't really totally get these problems. Can you help me solve this one? and explain everything please? 2x+3y=6+z x-2y=-1-z 3x+y=-1+3z

85. ## compounded interest

calculate the future value of an investment of \$8,500 if it is to be invested for 9 years at an interest rate of 6.1%, compounded quarterly.

86. ## physics homework

a hockey puck of mass 0.05kg sliding on the ice with velocity 20m/s is stopped by a goalie in 0.10sec. what is the magnitude and direction of the force exerted by the goalie on the puck.

87. ## interest rate

what must the interest rate be if an investment is to double its value in 15 years, compounded monthly in decimal form, rounded to 3 significant figures

88. ## algebra

Help me please I get confused with the positives and negatives. Please be kind to check my work and let me know where am I going wrong -4x + 10 = 58 -4x + 10 -10 = 58 -10 (is it - or +10?) -4x = 48 or 68 (do i add 58&10 or sub?) -4x/-4 = 48/-4 or 68/-4 (is

89. ## Buiness Communications I

Many cmpanis have found tat family-friendly policies: a. are good recruiting tools, but often result in relocation failures. b. are one of the six leading reasons that new managers fail. c. have given employees with children higher overall compensation

90. ## math

A money market fund pays 14% annual interest compounded daily. What is the value of \$10,000 invested in this fund after 15 years?

With increased market glo alization, intercultural competence: a. becomes lessof a challenge b. is aided significantly by advaned technologies such as faxes overnight lelivery, and e-mail c. reduces the chances of interacting with people who speak another

92. ## accounting

Derm Travel Agency accepted a four-month, 9% interest rate, 52.000 note from one otits customers on May 1, 2008. The entire balance is payable at the notes maturity. Prepare the May 31 adjusting journal entry related to this note. Do I debit cash and

why is it that cars skid when friction is small?

94. ## math

The sample mean to be calculated from a random sample of size n= 4 from a population consistsof eight measurements (2, 6, 9, 12, 25, 29, 39, 50) . find the sampling distribution of y y .(hint : there are 70 samplesof size 4 when sampling from a population

95. ## Physics Homework

A 2000 lb box is being held at rest submerged in water. The box is displacing 2500 lbs of water. When the box is released from its submerged position, the box will a. sink b. rise to the surface and float c. remain where it is d. result unknown Ok, so if

96. ## Physics

A 2.30 102 N force is pulling an 80.0 kg refrigerator across a horizontal surface. The force acts at an angle of 21.0° above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 7.00 m. (a) Find the work done

97. ## physics

A small motor is mounted on the axis of a space probe with its rotor (the rotating part of the motor) parallel to the axis of the probe. Its function is to control the rotational position of the probe about the axis. The moment of inertia of the probe is

98. ## physics homework

0.2kg mass hangs at the end of the wire. what is the tension if the ball is then whirled around in a horizontal circle with tangential velocity of 5m/s

99. ## Algebra

Solving systems of linear equations in 3 variables... 1) 3x-2y+2z=1 2) 2x+5y-5z=7 3) 4x-3y+z=-3 I combined 1 and 3 to get -5x+4y=7 And then i combined 2 and 3 to get -13y+11z=-17. Can that be right? how would you combine those two equations?

100. ## physics

Two objects move on a horizontal frictionless surface along the same line in the same direction which we shall refer to as foward direction. The trailing object of mass 2.0kg has a velocity of 15m/s foward. The leading object of mass 3.2 kg has avelocity

101. ## english

so i am really confused if this is a hyperbole: the tattoo killed him. i am reading the same book as another girl called the barcode tattoo and i am in need of some hyperboles for my project. please tell me if that quote: the tatoo killed him, is an

102. ## english

are there any objects that represent perseverence? and why? i need this for an english projcet

103. ## Heatlh care

which type of medical service reimbursement is the least used today?

104. ## Chemistry

What is [OH-] of a solution containing 013 mol Ba(OH)2 and .021 mol KOH in .50L of H2O?

105. ## chemistry

What is the concentration of hydroxide ions in a solution with a pH of 9.00?

106. ## accounting

Adnan's Flower Shop provides floral arrangements for holidays and events. Adflans sold Oxford Cdy Hall a holiday arrangement for 10,000 on account in November Due to a government shutdown in December, Oxford only paid \$1,500 otthe amount due within the

107. ## Physics

A square, 0.69 m on a side, is mounted so that it can rotate about an axis that passes through the center of the square. This axis is perpendicular to the plane of the square. A force of 17.1 N lies in this plane and is applied to the square. What is the

108. ## Algebra

solving linear equations with 3 variables 1) x+y=1300 2) x+2z=1400 3) x+y+z=1600 this one should be so easy but i don't get which equation i should pick first?!

109. ## ENGLISH

List as many irrelevant factors as you can think of that people often mistake for signs of expertise on the part of an individual( for example; appearing self-confident) I say 1. Boastful 2. Educational background

110. ## Computer Programing & Logic Design

Submit pseudocode and a flowchart for the following programming exercise: Software Sales A software company sells a package that retails for \$99. Quantity discounts are given according to the following table: Quantity Discount 10-19 20% 20-49 30% 50-99 40%

111. ## AP PHYSICS

A water skier lets go of the tow rope upon leaving the end of a jump ramp at a speed of 14.9 m/s. As the drawing indicates, the skier has a speed of 10.9 m/s at the highest point of the jump. Ignoring air resistance, determine the skier's height H above

112. ## Algebra

Solve the system of equations by the substitution method X+9y=32 2x+4y=8

113. ## math

N=x-y-z Where x,y,z are variable representation of some digit (0 to 9) Alok is like to maximize N while Bhanu Is like to minimize it towards this end ,Alok chooses a single digit number and bhanu substitute this for a variable of her choice (x,y or z)also

114. ## physics

Part A. With what minimum speed must you toss a 190 g ball straight up to hit the 12 m-high roof of the gymnasium if you release the ball 1.5 m above the ground? Solve this problem using energy. Part B. with what speed does the ball hit the ground?

115. ## chemistry

Acetic acid ionizes in water according to the following equation: CH3COOH = H^+ +CH3OO- if the solution is .773 M acetic acid, what is the concentration of H^+?

116. ## Physics

is a collision an example of an interaction?

117. ## Physics

A man of mass 65.2 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 22.7 kg and is 2.4 m long. Suppose the man stands to the right from the middle of the scaffold that is a distance one sixth of the length of the

Can you please check my answer? Solve for x. 7- 7/2x = -5 my answer: x = 42

Solve for x. 6 - x = -10 + 7 my answer: x = 9

120. ## College Algebra

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -7x – y = -30 4x + y = 21

t: Review - Adjectives, Adverbs, and Comparison • Use at least five adverbs and five adjectives to write a 150- to 300-word review of a movie, sporting event, musical performance, or television show. • Bold each adverb. • Underline each adjective.

122. ## College Algebra

The point (6, 2) lies on the line -x – 8y = -22. Determine if this point is a solution of the system -x – 8y = -22 -7x + 3y = -36

123. ## College Algebra

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 11x + 8y = 103 22x – 7y = 68

124. ## algebra

Select the set of equations that represents the following situation: The sum of two numbers is 36, and their difference is nine more than the smaller number. What are the two numbers?

125. ## EXAMPLES of SPeed

What would be some examples of speed? Like how fast a car is going?

126. ## algebra

Select the set of equations that represents the following situation: Mike invested \$706 for one year. He invested part of it at 5% and the rest at 3%. At the end of the year he earned \$28.00 in interest. How much did Mike invest at each rate of interest?

127. ## algebra

A university bookstore recently sold a wire-bound graph-paper notebook for \$2.64, and a college-ruled notebook for \$3.61. At the start of spring semester, a combination of 50 of these notebooks were sold for a total of \$168.86. How many of each type were

128. ## algebra - college

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 11x + 8y = 103 22x – 7y = 68

129. ## geometry

How do I draw an acute scalene triangle with lengths of 8cm, 10cm, and 16cm?

130. ## Government

The Farmers called our government a republic instead of a democracy because they wanted to be clear that they were creating a representative constitutional democracy and not a direct democracy. If the Framers were alive today? 1. What do you think they

131. ## physics

A 0.2 kg mass hangs at the end of a wire. what is the tension in the wire if the ball is whirled around in a horizontal circle with tangential velocity of 5 m/sec

132. ## chemistry

how many moles of SO3 will be produced from 9.1 mol O2

133. ## Physics

A roller-coaster car speeds down a hill past point A and then rolls up a hill past point B. The car has a speed of 16.1 m/s at point A. The acceleration of gravity is 9.81 m/s^2. Radius of Circle A is 9.98 m. Radius of Circle B is 15.5 m. a) If at point A

134. ## science

A farmer planted a field of Bt 123 corn and wants to estimate the yield in terms of bushels per acre. He counts 22 ears in 1/1000 of an acre. He determines that each ear has about 700 kernels on average. He also knows that a bushel contains about 90 000

135. ## Computer Programing & Logic Design

Submit pseudocode and a flowchart for the following programming exercise: Largest and Smallest Design a program with a loop that lets the user enter a series of numbers. Theuser should enter -99 to signal the end of the series. After all the numbers have

136. ## math

What fraction is greater? 5/16 or 5/17?

137. ## Biotechnology

How would you make 450 mL of a 0.250 M NaOH solution?

138. ## DNA

Hi can anyone clarify the following please Three unrecognisable bodies are found Genotype of bodies found at a house fire Locus Body 1 Body 2 Body 3 D3S1358 14,19 16,18 14,18 vWA 15,21 18,18 17,21 D16S539 11,11 12,13 11,12 D2S1338 18,19 18,24 18,23 D8S1179

139. ## Precalc

Find the indicated nth term of the geometric sequence. 7th term a5: -2/81 a9: -2/6561 I know the formula is an= a1 r ^ n-1 but I can't figure out how to apply it

stocks in the health industry depreciated by 5.7% in the first eight months of 1993. Assuming that this trend were to continue, how much would a \$70,000 investment be worth in 8 years? (Hint: 8 years corresponds to 12 eight-month periods. Round your answer

2(x-2)3(x-5

142. ## physics

A hockey puck of mass 0.05 kg sliding on the ice with velocity 20m/sec is stopped by a goalie in 0.10 sec. what is the magnitude and direction of the force exerted by the goalie on the puck

143. ## physics

A bullet of mass 15 gm is shot horizontally into a 15 kg block of wood attached to a spring of spring constant 1000 N/m. The force of the impact compresses the spring 10 cm. What is the velocity of the bullet?

144. ## physics

A block is pushed 2 m along a fixed horizontal surface by a horizontal force of 10 N. The opposing force of friction is 0.4 N (a)How much work is done by the 10 N force? (b)what is the work done by the friction force

145. ## Chemistry

How much heat is needed to increase the temperature of 100.00g of water by 1.0 degree celsius? By 10.0 degrees celsius? By 20.0 degrees celsius?

146. ## SPEED And VElocity

I thought that they were the same thing. Are they not? What would be some examples for Velocity?

147. ## physics

A ball is thrown vertically upward with a speed of 27.6 m/s. How high does it rise? Answer in units of m.

148. ## Physics

How does the eye adjust the focus of an image on the retina?

149. ## Physics

As the temperature of an object becomes higher, what happens to the average wavelength of the radiation it emits?

150. ## physics

Two objects move on a horizontal frictionless surface along the same line in the same direction which we shall refer to as foward direction. The trailing object of mass 2.0kg has a velocity of 15m/s foward. The leading object of mass 3.2 kg has avelocity

151. ## Physics.

A stack of papers in the rear of a delivery truck moving at 20m/s has a 20kg mass. What is the minimum radius the truck can turn for the papers not to slip if coefficient of static friction is 0.3?

152. ## Physics.

A hilly road has a 20 m radius top to one of its hills. What is the minimum speed for a car to just leave the road at the top of this hill?

153. ## physics

A 11.0kg weather rocket generates a thrust of 230N . The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 510 N/m , is anchored to the ground. After the engine is ignited, what is the

154. ## Displacement and Velocity

A turtle moves 3.5m [E] in 136 s and then moves 1.7m [W] in 88 s. a) What is the average speed of the turtle? b) What is the average velocity of the turtle? average speed: D/T = 3.5m + 1.7m = 5.2m/ 224s = 0.024m/s average velocity:??????????/

155. ## Chemistry

I am having some difficulties balancing the following equations: Cr2O3(s)+CO(g)->Cr(s)+CO2 Ca(OH)2(aq)+Na3PO4(aq)->Ca3(PO4)2(s)+NaOH(aq) Sb2S3(s)+O2(g)->Sb2O3(s)+SO2(g)

1. Assignment: Review - Adjectives, Adverbs, and Comparison • Use at least five adverbs and five adjectives to write a 150- to 300-word review of a movie, sporting event, musical performance, or television show. • Bold each adverb. • Underline each

157. ## world history

a report card on napoleon's accomplishment.mark him pass or fail in the areas listed below -representative government -legion of honor -government leadership -military skills -organization of local government -rights of labor union

158. ## com/155

write five sentences about the role of education in successful financial planning, in which you correctly use a different verb tense in each sentence. Mark each verb used in bold and, in parentheses, identify the specific tense use I need help to

159. ## 2 biology terms

Hello, I'm a bit confused as to the difference between morphological and anatomical. Thanks

160. ## physics

A freight company uses a compressed spring to shoot 2.00 kg packages up a 1.00-m -high frictionless ramp into a truck, as the figure shows. The spring constant is 481 N/m and the spring is compressed 30.0 cm . A. What is the speed of the package when it

161. ## History

who was for and against the winnipeg general strike?

162. ## physics

A 67.0 g ice cube can slide without friction up and down a 26.0 degree slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 12.0 cm . The spring constant is 20.0 N/m .When the ice cube is released, what

163. ## Math(geometric sequences)

A certain antibiotic reduces the number of bacteria in your body by 10% each does. a)If four does of the antibiotic are taken, what percent of the original bacterial population is left? I think the formula is supposed to be tn=100(9/10)^-1, but when i

164. ## English

Can someone edit this for me please?? What female born in the 1800's was full of bravery and determination? What female risked her life to save others? What female was a Conductor in the Underground Railroad, Spy for federal forces in South Carolina and a

165. ## Physics

A certain wave is incident on an interface at an angle of 40 deg. The wave emerges into the other material at an angle of 30 deg. Crossing the interface, the wave: a. increased speed b. reduced speed c. maintained constant I think reduces its speed, but

166. ## chemistry

Predict the molecular and bond angle for each molecule or ion given below: SO3, ClO3-, NF3, SO42-

167. ## DEFINE: Magnitude

What wud the defenition of magnitude be in the physics/motion. ?

168. ## Computer Programming

Project: I need help getting start on this project. What I have so far is a mess. It's Do While loops and nested loops. Table 6.1 shows the different grads of eggs and the minimum weight required for each classification. Write a program that processes the

169. ## Difference between position and distance

WHat is the difference between position and distance?

1. Assignment: Review - Adjectives, Adverbs, and Comparison • Use at least five adverbs and five adjectives to write a 150- to 300-word review of a movie, sporting event, musical performance, or television show. • Bold each adverb. • Underline each

171. ## Algebra

Solve the system -3x+4y=-6 5x-3y=-22 3y+2z=-1 I'm not sure how to approach this question because all of the equations are missing a variable??

172. ## Kinsesiology

Which actually are the muscles of the hip?

173. ## Chemistry

In calcium, the electron configuration is 2-8-8-2. Why does the 3rd level have more energy than the 2nd if they're both 8?

174. ## Accounting

I have a problem with management accounting However, I have trouble posting the question here Is it possible that i can send it to someone for their assistance

175. ## calculus

find the first derivative of y=cos(/9t+11

Solve the system -3x+4y=-6 5x-3y=-22 3y+2z=-1 I'm not sure how to approach this question because all of the equations are missing a variable??

177. ## Difference between position and distance

What is the difference between position and displacement? Would the only difference be that position is a scalar and displacement is a vector?

178. ## calculus

A rectangle is inscribed with its base on the x-axis and its upper corners on the parabola y=12−x2. What are the dimensions of such a rectangle with the greatest possible area?

179. ## child care

one component of a healthy diet is a high amount of

180. ## AP World History

Why is it not accurate to call Europe from 300-1200 totally "Feudal"?

181. ## Chemistry

I always have trouble with making an hypothesis for a lab. I was wondering if someone can help me come up with a hypothesis for a formation of salt lab. Thanks!

182. ## Algebra

3x-9y=63 2x-6y=-18 Solve system of equations by graphing then classify as Independent on dependent and consistent or inconsistent?

183. ## Maths

When the numerator and denominator of a fraction are each increased by 5, the value of the fraction becomes 3/5 When the numerator and denominator of that same fraction are each decreased by 5, the fraction is then 1/5 Find the original fraction. (Hint:

184. ## Maths

A truck is loaded with two different types of crates. When 20 of crate A and 25 of crate B are loaded, the truck’s 8 tonne capacity is reached. When 2 of crate A and 16 of crate B are loaded, the same capacity is reached. Calculate the mass of each

185. ## maths

The linear equation F=ac + b is used to change temperature from degrees Celsius (°C) to degrees Fahrenheit (°F). Given that 0°C = 32°F and 100°C = 212°F, calculate the constants a and b.

186. ## Maths

A hall has 1325 seats. These are arranged in rows of 35 seats or 40 seats. The ratio of 35-seat rows to 40-seat rows is 3 : 4. How many rows are there? Simultaneous equation please

187. ## Physics

A bullet of mass 3.3 10-3 kg moving at 750 m/s impacts with a large fixed block of wood and travels 5 cm before coming to rest. Assuming that the deceleration of the bullet is constant, find the force exerted by the wood on the bullet? I am confused on how

188. ## Maths

Con has twice as much money as Fiona. If Fiona earns an extra \$15, Con will only have one-and-a-half times her amount. How much money does each person have? Simultaneous equations

189. ## Maths

A company employs 4 times as many unskilled workers as it does skilled workers. Unskilled workers earn \$650 a week, and skilled workers earn \$850 a week. The weekly wage bill for these workers is \$17 250. How many skilled and unskilled workers are there?

190. ## statistics

Suppose the method of tree ring dating gave the following dates A.D. for an archaeological excavation site. 1248 1187 1199 1236 1206 1241 1185 1288 1239 Find an 80% confidence interval for the mean of all tree ring dates from this archaeological site.

191. ## chemistry

In the ground state of an atom of silver (Ag), how many electrons will there be with the quantum number l = 1?

192. ## math calculus

Use implicit differentiation to find the equation of the tangent line to the curve xy^3+2xy=9 at the point (31). The equation of this tangent line can be written in the form y=mx+b where m is

193. ## Chemistry

Calculate the velocities of electrons with de Broglie wavelengths of 1.7 102 nm and 5.0 nm, respectively.

194. ## Physics

How much work must be done to stop a 970 kg car traveling at 115 km/h?

195. ## Math--Calculus

I'm having a tough time figuring out this problem... S(x) = bracket (piecewise function) a + b arcsin*(tan x/tan 66) for 0 ≤ x < 66 24 for 66 ≤ x ≤ 90. Is the function differentiable? Why or why not? Could someone please help me? My teacher told me