# Questions Asked onSeptember 30, 2012

1. ## Physics

A mass m1 = 3.3 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 = 4.4 kg which hangs freely from the string. When released, the hanging mass falls a distance d = 0.87 m. 1) How much work is done

2. ## Algebra

Which sets of ordered pairs represent functions from A to B? (Select all that apply), and Explain how you've gotten your answer? A = {a, b, c} B = {8, 9, 10, 11}

3. ## Physics

particle A moves along the line y = 30m with a constant velocity of magnitude 3.5 m/s and parallel to the x axis. At the instant particle A passes the y axis, particle B leaves the origin with 0 initial speed and constant acceleration of magnitude 0.50

4. ## Precalc

# 1 a special window has the shape o a rectangle surmounted by an eqilatera tiangle. ifthe perimeter o the winow is 16 ft, what dimensions will admit te most light (area of triangle= suarre root of 3/4 times x2.

5. ## Maths

Lower quartile=39, Upper quartile=63. Measurements of wind speed on a certain island were taken over a period of one year. A box-andwhisker plot of the data obtained is displayed above, and the values of the quartiles are as shown. It is suggested that

6. ## Physics

A 4 kg block slides down a rough inclined plane inclined at 30° with the horizontal. Determine the coefficient of kinetic friction between the block and the surface if the block has an acceleration of 1.2 m/s2.

7. ## physics

a projectile is launched at a velocity of 125m/s at an angle of 20 degrees. A building is 200m away. At what height above the ground will the projectile strike the building?

8. ## chemistry

The metabolic oxidation of glucose, C6H12O6, in our bodies produces CO2, which is expelled from our lungs as a gas. C6H12O6(aq) + 6 O2(g) → 6 CO2(g) + 6 H2O(l) Calculate the volume of dry CO2 produced at body temperature (37°C) and 0.980 atm when 25.5 g

9. ## Maths

The ratio of the volume of water in Jug A to the volume of water in Jug B is 2:5. A.) If half of the water in Jug A is poured into Jug B, what is the new ratio of the volumes of water in Jug A to Jug B? B.) If half of the water in Jug B is poured into Jug

10. ## Accounting

If a company erroneously records a \$500 deposit as \$50 in its records, which of the following must occur when reconciling its bank statement? a. The company must increase the balance per its records by \$500. b. The company must decrease the balance per its

11. ## Algebra1

A special snack mix uses raisins, peanuts, and chocolate candies in the ratio 1:2:5 , respectively. In a snack mix of 112 ounces, how many ounces of peanuts are used? I got 28 ounces of peanut.

12. ## STATS

The following confidence interval is obtained for a population proportion, p:0.556 < p < 0.584. What is the point estimate, p?

13. ## Calculus

Given that f is a differentiable function with f(2,5) = 6, fx(2,5) = 1, and fy(2,5) = -1, use a linear approximation to estimate f(2.2,4.9). The answer is supposed to be 6.3. Here's what I've done so far: L(x,y) = f(2,5) + fx(2,5)(x) + fy(2,5)(y) L(x,y) =

14. ## HEALTH

1. Which of the following statements about defensive medicine is true? A. Insurance companies encourage it. B. It's the result of fewer malpractice claims. C. It can mean excessive medical tests. D. It's motivated by the needs of the patient 2. The jury

15. ## Physics

A sandbag is dropped from the helicopter 125 m above the ground. What is its velocity at a height 60.0 m and when it hits the ground?

16. ## Psychology

In Maslow's needs hierarchy, people whose need for _______ has been fulfilled are poised to ascend to the level of self-actualization. A. safety B. love and belongingness C. esteem D. achievement My answer is D am I correct?

17. ## English

An epic tale can also be defined as _______. (my answer)A.a long narrative poem B.a historical chronicle in verse C.a dramatic retelling of a country's history I went back through the text we read and my notes from the lesson and "epic tale" was never

18. ## physics

Two forces, F1 and F2 act on the 7.00-kg block shown in the drawing. The magnitudes of the forces are F1=59.0 N and F2=33.0N. What is the horizontal acceleration (magnitude and direction) of the block? F1 makes a 70 degree angle with the horizon.

19. ## Psychology

Which statement about anorexia nervosa is true? A. Anorexics almost never starve to death, although they may die from other disorders. B. Sufferers are usually males between the ages of 12 and 40. C. People with this disorder may well be attractive and

20. ## math

The present value of the money in your savings account is \$420, andyou're receiving 3% annual interest compounded monthly. what is the future value in two months? a.\$432.60 b. \$426 c. \$422.10 d. \$424.11 You've just received anorder of silk flower

21. ## physics

You are given a vector in the xy plane that has a magnitude of 85.0 units and a y component of -60.0 units. What are the two possibilities for its x component?

22. ## physics

A rocket is launched with a speed of 282 m/s at an angle of 41.2 degrees above the horizontal. How far does the rocket travel before it hits the ground?

23. ## PHYSICS

A bare helium nucleus has two positive charges and a mass of 6.64 10-27 kg. (a) Calculate its kinetic energy in joules at 2.00% of the speed of light. J (b) What is this in electron volts? eV (c) What voltage would be needed to obtain this energy? V

24. ## Chemistry

A 45-kg sample of water absorbs 345 kJ of heat. If the water was initially at 22.1 degrees celcius, what was the final temperature?

25. ## math

A salesperson has two job offers. Company A offers a weekly salary of \$150 plus commission of 6% of sales. Company B offers a weekly salary of \$300 plus commission of 3% of sales. What is the amount of sales above which Company A's offer is the better of

26. ## Mathematics

A jar has eight red, nine blue, and ten green marbles. What is the least number of marbles that you can remove from the jar and be certain that you have three of the same color?

27. ## Math

You are given 9 to 1 odds against rolling a sum of 8 with the roll of two fair dice, meaning you win \$9 if you succeed and you lose \$1 if you fail. Find the expected value (to you) of the game.

28. ## Psychology

If you support the idea that physiological arousal and the experience of an associated emotion will occur simultaneously, you'll agree with the A. biological emotion-activation theory. B. James-Lange theory of emotion. C. Cannon-Bard theory of emotion. D.

29. ## Physics

A delivery truck travels 19 blocks north, 14 blocks west and 15 blocks south. What is its final displacement from the origin? whats the degrees???

30. ## Maths

The ratio of the amount of money Karen had to the amount of money Peter had was 2:5. Peter received \$75 from his mother, the ratio became 4:15. How much money did each person have at first?

31. ## Chemistry

I'm having a hard time understanding Endothermic and Exothermic reactions, like their standard format and stuff. For Exothermic reactions the heat is getting released into the surroundings, the products will be less than the reactants, so I would assume

32. ## physics

Two charges A and B are fixed in place, at different distances from a certain spot. At this spot the potentials due to the two charges are equal. Charge A is 0.22 m from the spot, while charge B is 0.54 m from it. Find the ratio qB/qA of the charges. Help!

33. ## English

Thomas Jefferson and Thomas Paine shared a similar purpose for writing. What was their purpose?

34. ## Chemistry

A bicycle tire is filled with air to a pressure of 610 kPa at a temperature of 19 oC. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58 oC. The volume of the tire increases by 4.0%. What is the new pressure in the bicycle

35. ## Math

Chelsea had made six of seventeen free-throw attempts. How many consecutive free throws must she make to raise her percentage of free throws made to exactly 50 percent?

36. ## critical t hinking

Reporter: A new campaign finance reform bill being considered by Congress would limit the amount of campaign contributions that political candidates can receive. However, a survey of candidates running for mayor, governor, and senate seats shows that not

37. ## Physics

A tire placed on a balancing machine in a service station starts from rest and turns through 4.71 revolutions in 1.29 s before reaching its final angular speed. Calculate its angular acceleration.

38. ## Predicate and subjects

1. The smell of cooking is delicious to the hungry camper. 2. A good fire is difficult to build. looking for simple subject and predicate 1, smell. Predicate. Camper subject 2. Fire subject. Build predicate

39. ## Chemistry

3. Calculate the amount of isopentyl acetate that should be present in the reaction mixture at equilibrium based on 300 mmol of acetic acid and 150 mmol of isopentyl alcohol as starting quantities. Use equilibrium constant of 4.2 for this calculation.

40. ## Production & Operations Mgmt in Business

If someone could help me, I am truly desperate here. I am struggle with this problem. – Simple Linear Regression Applications Interpretation and Use of Computer Output (Results) (1) The management of an international hotel chain is in the process of

41. ## Psychology

In Piaget's model of cognitive development, a child's tendency to view the world entirely from his or her own perspective is referred to as A. the sensorimotor stage. B. the concrete operational stage. C. egocentric thought. D. metacognition. My answer is

42. ## Chemistry

When H2 gas is collected over water, why is there water vapour in it? How does water vapour get into the hydrogen gas collected?

43. ## Maths

Tina and Gopal had some stickers in the ratio 2:3. Gopal gave half of his stickers away and the ratio became 4:3. If Gopal had given away 21 stickers, how many stickers did each person have at first?

44. ## Maths

There were 3 glasses containing the same volume of liquid. Mr Lee poured 210 ml of the liquid from Glass A into Glass C, and 150 ml of the liquid from Glass B into Glass C. In the end, the ratio of the volume of liquid in Glass A to the volume of liquid in

45. ## physics

One strategy in a snowball fight is to throw a snowball at a high angle over level ground. While your opponent is watching the first one, a second snowball is thrown at a low angle timed to arrive before or at the same time as the first one. Assume both

46. ## math

A side of regular polygon is 3.5 cm in length.the perimeter of the polygon is 17.5 cm. How many sides does the polygon have?

47. ## physics

The three vectors in the figure below have magnitudes a = 2.45 m, b = 3.15 m, and c = 15.0 m and angle θ = 36.5° find x component of vector a

48. ## PHYSYICS

Vector V1 is 6.29 units long and points along the negative x axis. Vector V2 is 4.23 units long and points at +35.0° to the +x axis. (a) what is V1x & V1y (b) what is the magnitude & direction (degrees)

49. ## Chemistry

Imagine that you needed to choose an indicator for the titration of a strong base (like NaOH) with a strong acid (like HNO3). You have the indicators in Table 1 available. Which indicator would you choose? Why? Indicator [HIn] [ In] pKa Maryland Red- Red

50. ## Math

Write a number that has a hundreds digit less than 7, a tens digit less than 5, a tenths digit one more than its tens digit, a thousandths digit twice the tens digit, and other digits of your choice.

51. ## calc

A window consists of a rectangular part of height h surmounted by a semicircle of radius r. The perimeter of the window is held constant at 10 feet, but h and r are allowed to vary. Find an expression for the rate of change of h with respect to r.

52. ## precalc

f(x)=2+4x-x^2 when x is less than 2 thus f-1(x)=2-sqrt(-x+6) i need to show that f(f-1(x))=x, but i keep getting negative x...any help

53. ## chemistry

what type of bond would carbon, sodium, and neon form?

54. ## Math

While preparing the February 28th bank reconciliation for the checking account for Willow, Inc., the accountant identified the following items: Willow's balance according to the general ledger \$46,200 Outstanding checks \$1,100 Interest earned on the

55. ## Science

What happens when 1 Liter of Carbon Tetrachloride is poured into a container of Water?

56. ## Gr. 12 Physics

A pilot must fly his plane to a town which is 200km from his starting point in a direction 30degrees N of E. He must make the trip in 1/2 h. An 80km/h wind blows in a direction 30degrees E of S. Find the speed of the plane relative to air. I found the

57. ## Economics

Here goes... 1. Consider a model in which an individual lives two periods: this period (time one) and next period (time two). This period his budget constraint requires that his consumption, c1; plus his saving, s; equals his income, y1: c1 + s = y1: Next

58. ## english

Edit the following sentences to correct misplaced or awkwardly placed modifiers. Revisions of lettered sentences appear in the back of the book. The flood nearly displaced half of the city’s residents, who packed into several overcrowded shelters.

59. ## Biochem

1 ml of whole blood is collected and centrifuged to obtain a plasma sample. The volume of the plasma sample is 600 microlitres. A 1 in 4 dilution of the plasma is made and analysed using a cholesterol assay like the one you performed in the laboratory. 10

60. ## physics

a toy car runs off the edge of a table that is 1.225 m high. if the car lands .400 m from the base of the table (A) how long does it take for the car to fall and (B) what is the horizontal velocity of the car?

61. ## 7/8 Math

8 - 3x = 128 what is the value of x?

62. ## physics

A dentist's drill starts from rest. After 3.62 s of constant angular acceleration it turns at a rate of 2.70E+4 revolutions per minute. Find the drill's angular acceleration. Determine the angle through which the drill rotates during this period.

63. ## Physics

A 0.300 kg puck, initially at rest on a frictionless horizontal surface, is struck by a 0.215 kg puck that is initially moving along the x axis with a velocity of 2.14 m/s. After the collision, the 0.215 kg puck has a speed of 1.14 m/s at an angle of q =

64. ## Physics

You are standing at the top of a deep, vertical cave and want to determine the depth of the cave. Unfortunately, all you have is a rock and a stopwatch. You drop the rock into the cave and measure the time that passes until you hear the rock hitting the

65. ## 7/8 Math URGENT!!!

8 - 3x = 128 Subtract 8 from both sides. -3x = 120 x = 120/-3 x = -40 Can someone explain this to me?? I don't understand why you would subtract 8 and not add 8... also, why did the 3 suddenly become a negative? HELP ;D

66. ## Algebra

An investor invested a total of \$1400 in two mutual funds. One fund earned a 6% profit while the other earned a 2% profit. If the investor's total profit was \$72, how much was invested in each mutual fund?

67. ## English/ History

In History, we are reading the book _My Brother Sam is Dead_ and one of the questions asked: What did Sam's being home reveal about discipline among the Rebel troops? Please help me understand what the question means, thanks!

68. ## Physics

A sip is heading due west at a steady speed of 15km/hr. A current of 3km/hr is running due south. Calculate the velocity of the ship relative to the seabed.

69. ## 7/8 Math

20 - K/15 = 17 What is the value of k?

70. ## Physics explain why 2

A small guy moving at a high speed collides with a stationary large football player. Now, which person experiences the larger force during the collision? how and why?

71. ## Physics

The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.39 rad/s^2. It accelerates for 30.3 s, then maintains a constant angular velocity. Calculate the total angle through which the wheel has turned 69.1 s after

72. ## chemistry

How to balance simple oxidation-reduction reactions by the half-reaction method. Mg (s) + N2 (g)= Mg3N2 (s)

73. ## Physics

Block A has a mass of 2.60 kg and rests on a smooth (frictionless) table and is connected to block B, which has a mass of 2.40 kg, after passing over an ideal pulley, as shown. Block B is released from rest. What is the acceleration of the masses?

(-36)/(-2) =

75. ## chemistry

A sample of the male sex hormone testosterone, C19H28O2, contains 4.09 1021 hydrogen atoms What is the mass of this sample in grams? i got 0.0697g but its wrong

76. ## pre-calculus

solve for the follow inequality. write your solution in interval notation. x^3-49x¡Ü0

77. ## chemistry

a 250.0 ml sample of an aqueous solution at 25 degrees celsius contains 35.8 mg of an unknown nonelectrolyte compound. If the solution has an osmotic pressure of 11.25 mmHg, what is the molar mass of the unknown compound? I know you need to have the answer

78. ## Grammar

Do I use to or for? The company was a great success (to, for) Florida.

79. ## Computers

Daily Life Magazine wants an analysis of the demographic characteristics of its readers. The Marketing Department has collected reader survey records containing the age, gender, marital status, and annual income of readers. Design an application that

80. ## Chemistry

In four of the following groups, the three substances are either all strong electrolytes, all weak electrolytes, or all nonelectrolytes. Which group has one member which is NOT like the others in the group? 1. BaCl2; NaNO3; HF 2. O2; CO(NH2)2; CH3OH 3.

81. ## Physics

Two packing crates of masses m1 = 10.0 kg and m2 = 4.10 kg are connected by a light string that passes over a frictionless pulley as in the figure. The 4.10-kg crate lies on a smooth incline of angle 33.0°. (a) Find the acceleration of the 4.10-kg crate.

82. ## Chemistry

In the redox conversion of CO to CO2− 3 , the oxidation number of C goes from (−2, 0, +2) to (−4, −2, +4, +6). Recall that the oxidation number of oxygen is typically −2. 1. +2; +6 2. −2; −4 3. 0; −2 4. 0; +6 5. −2; +6 6. +2; +4

83. ## Sociology

Did I answer this question correctly? wi If all of a company’s Filipino employees sit together for lunch, sociologists would say they have formed their own _________. (c) ingroup A). diversified group B). outgroup C). ingroup ( I chose this one, ingroup

84. ## Physics (Mechanics)

A 10-kg crate on a ramp is inclined at 30 degrees from the horizontal and released. The coefficients of friction between them are .48 (coefficient of static friction) and .28 (coefficient of kinetic friction). a) Does the block slide? b) What then is the

85. ## bridge to terabitha

Hello i read the book bridge to terabitha and i have an assignment i need some help on. i need to pick 5 characters and describe six events or circumstances that caused the character to change or evolve. i have picked the characters Jesse Oliver Aarons

86. ## MATH

DIVIDE 64 BUNDLES OF NEWSPAPERS INTO TWO GROUPS SO THE RATIO IS 3 TO 5

87. ## chemistry

How much energy is required to vaporize 75.5 mL of ethanol (C2H5OH, d=0.789 g/cm^3) at its boiling point, if its heat of vaporization is 40.5 kJ/mol?

88. ## Physics

Hello! I live in Mexico, and I have a couple of questions I asked on Y answers, both English and Spanish, and have gotten no reply, and I need to turn this in for my bimonthly exam in physics this Monday. I need to calculate the volume and surface area of

89. ## Geometry

If a regular pentagon has sides of four feet, what is the length from the vertex to the midpoint of the opposite side

90. ## MATH

Assume that all linear dimensions of an animal increase by 12%. Then the animal will have the same shape. How do the surface area, the volume and the weight (under assumption of constant specific gravity) increase? Give the percentage of the increase.

91. ## earth science

How do astronomers use satellites?

92. ## chemistry

a substance has a vapor pressure of 35.0 mmHg at 52.0 degrees Celsius and 70.0 mm Hg at 77.0 degrees Celsius. What is the heat of vaporization for this substance?

93. ## College Physic

can someone help me with this question? Thank you! You have taken a summer job at a warehouse and have designed a method to help get heavy packages up a 15º ramp. In your system a package is attached to a rope, which runs parallel to the ramp and over a

94. ## physics

A delivery truck travels 19 blocks north, 14 blocks west and 15 blocks south. What is its final displacement from the origin?

95. ## Geometry

Find the measure of each angle in a triangle with angles: x, (x-135), and 1/10 x

96. ## Ethics

Write a 400- to 600 -word personal reaction paper using the same ethical theory. This paper must include at least two references and address the following: · The essential points of the theory as you understand them · How this theory intersects with your

97. ## Chemistry

I'm looking for the moles, using the given amount of atoms. i was given 3.01 x 10^23 atoms of Ag the answer I got was 18.1 x 10^23 is this correct?

98. ## Physics

A mass of m1 = 6.00 kg is sitting on an inclined plane, which meets the horizantal at an angle of 22.0, which has a coefficient of sliding friction of 0.290, which is 3.50 m = L. a string is attached to m1, it is strung over a pulley, and attached to mass

99. ## social studies

where is urals mountains on the map.

100. ## Math

Assume that each female rabbit of a colony gives birth to three female rabbits. How many female rabbits of the tenth generation will be descendants of a singal rabbit of the first generation?

101. ## Math

A female moth lays nearly 150 eggs. In on year there may live up to five generations. Each larva eats about 20mg of wool. Assume that 2/3 of the eggs die and that 50% of the remaining moths are females. Estimate the amount of wool that may be destroyed b

102. ## physics

A superhero ﬂies 310 m from the top of a tall building at an angle of 30 ◦ below the horizontal. What is the horizontal component of the superhero’s displacement? Draw the vectors to scale on a graph to determine the answer. Answer in units of m Your

103. ## Science

Radium has a half-life of 1620 years and decays into radon, which has a half-life of 3.82 days. A 10-gm source of radium is sealed, and the radon produced is pumped off every 24 hours. How many mill curies of radon are pumped off each time?

104. ## Science

Natural Uranium contains 15 percent Sm147. Sm147 is radioactive and decays by alpha decay. What will be the number of disintegrations per gram per second of the natural element? The half-life of Sm147 is 1.3x1010 years.

105. ## Math

The base of an isosceles triangle is one inch shorter than the equal sides, and the altitude of the triangle is two inches shorter than the equal sides. What is the length of the equal sides?

106. ## STATISTICS

The height of PU men are normally distributed with mean 65 in. and standard deviation 5.3 in. find the probability of finding: a. A men selected is at least 75 in. tall? b. A man selected is no less than 58 in. tall?

107. ## bussiness low

How and why fraud invalidates a contract This subject example of undue influence and duress that can arise in the business context

108. ## Math

2≤|(|x|+1)/(x+3)|

asked by inequality absolute value of rational numbers
109. ## physics

Vector V1 is 6.29 units long and points along the negative x axis. Vector V2 is 4.23 units long and points at +35.0° to the +x axis. (a) What are the x and y components of each vector? V1x = V1y = V2x = V2y = (b) Determine the sum V1 + V2. Magnitude

110. ## Arithmetic Sequence

Given the third term of an arithmetic sequence less than the fourth term by three. The seventh term is two times the fifth term. Find the common difference and the first term.

111. ## Physics

A picture hangs on the wall suspended by two strings, as shown in the figure, with θ = 59°. The tension in string 1 is 1.9 N.

112. ## Finance

1.You buy a SML Bond for \$980. The bond has a face value of \$1000 and an annual coupon rate of 8%. There are 5 years left until maturity. Because of a special delivery by the stork, you decide to sell the bond at the end of year 2 for \$1050. What was your

113. ## physics

Three similar ideal cells (no internal resistances) supply current of 0.5 Ampere to a 10 Ohms resistor when they are in the parallel.How much current will they supply to the same risistor when they are connected in series aiding?

114. ## Finance

1.BAC is considering an issue of preferred stock. The dividends are 8.12% of the \$25 par value. a.If the current price is \$26.25 per share, what is the return on the preferred stock? b.Suppose the preferred stock will mature in 20 years. If the price is

115. ## physics

Three vectors are shown in Fig. 3-32 (A = 62.0 , B = 58.0°). Their magnitudes are given in arbitrary units. Determine the sum of the three vectors. (a) Give the resultant in terms of components. Rx = Ry = (b) What is the magnitude of the resultant? What

116. ## music

plz tell me the keyboard notes for playing the song saare jha han se accha

117. ## accountancy

You have been living in the house you bought 10 years ago for \$500,000. At that time, you took out a loan for 80% of the house at a fixed rate 30-year loan at an annual stated rate of 6%. You have just paid off the 120th monthly payment. Interest rates

118. ## physics

A car is driven 105 km west and then 65 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?

119. ## physics

1.) Draw a set of 1.5-volt cells in a series circuit so that the total battery voltage is 9 volts. A.) how many cell does it take? B.) show polarity connection. C.) suppose you connected one of the cells in part (a) so that it was backwards. what would the

120. ## physics

A delivery truck travels 15 blocks north, 21 blocks east and 18 blocks south. What is its final displacement from the origin? Assume the blocks are equal length. magnitude and direction

121. ## Maths

Sam used cement and sand to prepare a mixture. The ratio of the number of pails of cement used to the number of pails of sand used was 1:2. Sam then added 8 more pails of cement and the ratio became 5:2. A.) How many pails of cement was used at first? B.)

122. ## physics

Vector V1 is 8.98 units long and points along the negative x axis. Vector V2 is 4.00 units long and points at +50.0° to the +x axis. a) What are the x and y components of each vector? (b) Determine the sum V1 + V2.

123. ## physics

You are given a vector in the xy plane that has a magnitude of 90.0 units and a y component of -40.0 units. What are the two possibilities for its x component?

124. ## Maths

The ratio of the number of coins Azam had to the number of coins Eddie had was 3:7. Eddie gave 42 coins to Azam and they ended up having the same number of coins. How many coins did each person have at first?

125. ## math

divide33 photos into two groups so the ratio is 4 to 7?

126. ## physics

An airplane is traveling 675 km/h in a direction 42.5° west of north (a) Find the components of the velocity vector in the northerly and westerly directions. b) How far north and how far west has the plane traveled after 3.00 h?

127. ## physics

Three vectors are shown in Fig. 3-32 (A = 60.0 , B = 56.0°). Their magnitudes are given in arbitrary units. Determine the sum of the three vectors. (a) Give the resultant in terms of components. (b) What is the magnitude of the resultant? What is the

128. ## Philosophy

How might Hobbes argue that from the time of reformation (1517), with decline in the power of the pope, to WW1 no sufficient structure existed to support the Just War Theory?

129. ## Maths

(i)51 (ii)17.8

130. ## chemistry

for these chemicals write complete balanced equations for all possible reactions that would lead to an insoluble salt KCL BaCl2 AgNO3 Pb(NO3)2 K2SO4 HNO3

131. ## physics

A 44.8- child is standing on the outer edge of a merry-go-round that has moment of inertia 981 and radius 2.40 . The entire system is initially rotating at 0.180 . Find the angular velocity if the child moves to a final position 1.10 from the center of the

I don't know how to do area on a shape if it has missing numbers.. .also i need help on division with decimals...

133. ## Mathematics

A jar has eight red, nine blue, and ten green marbles. What is the least number of marbles that you can remove from the jar and be certain that you have three of the same color?

134. ## Physics

A boat, having an initial velocity of 6.6m/s east undergoes an average acceleration of 2.2 m/s squared south for 2.5 s. Determine final velocity after the time interval (magnitute and direction)

135. ## Physics

A projectile motion thrown with velocity of 200m/s direction of 53 degree above the horizontal?determine height,range,total time,time at particle reach maximum height?

136. ## IT/210

object-oriented design

137. ## Trigonometry

a satellite camera takes a rectangular-shaped picture. the smallest region that can be photographed is a 4km by 6km rectangle. as the camera zooms out, the length 1 and the width w of the rectangle increase at a rate of 3km/second. how long does it take

138. ## statistics

for a sample of 3 to have a mean of 115 would this be unusual

139. ## Trigonometry

a satellite camera takes a rectangular-shaped picture. the smallest region that can be photographed is a 4km by 6km rectangle. as the camera zooms out, the length 1 and the width w of the rectangle increase at a rate of 3km/second. how long does it take

140. ## History California

what was the importance of sebastian Vizcaino in 1602

141. ## Statistics

he life expectancy of a lung cancer patient treated with a new drug is normally distributed with a mean of 4 years and a standard deviation of 10 months

142. ## test

is there a website for the questions "Sees Behind Trees"

143. ## french

write 3 rules for the classroom ( they can be silly) Translate them to english.

144. ## Physics

A 2050 kg car rounds a circular turn of radius 18.5 m. If the road is flat and the coefficient of friction between tires and road is 0.680, how fast can the car go without skidding?

145. ## maths trigo

prove that sin(n+1)A-sin(n-1)A/cos(n+1)A+2cos(nA)+cos(n-1)A=tanA/2

146. ## Pre-Calc

f(x)=(24x3+68x2+24x−32)/(4x3+56x2+236x+280) I need help finding the roots and the hole for this problem.

147. ## UMD

A solution of H2SO4(aq) with a molal concentration of 3.22 m has a density of 1.183 g/mL. What is the molar concentration of this solution?

148. ## PHYSICS

Vector V1 is 6.29 units long and points along the negative x axis. Vector V2 is 4.23 units long and points at +35.0° to the +x axis. (a) What are the x and y components of each vector? (b) Determine the sum V1 + V2.

149. ## Quantum Physics

An electron drop to what energy level is likely to emit a photon in the infrared region?

150. ## physics

A steel ball is dropped onto a hard floor from a height of 2.15 m and rebounds to a height of 2.09 m. (Assume that the positive direction is upward.) (a) Calculate its velocity just before it strikes the floor. -6.49 m/s (b) Calculate its velocity just

151. ## physics

What is the component of a vector (in the plane) whose magnitude is 86.4 and whose component is 62.5?

152. ## physics

1.) Draw a set of 1.5-volt cells in a series circuit so that the total battery voltage is 9 volts. A.) how many cell does it take? B.) show polarity connection. C.) suppose you connected one of the cells in part (a) so that it was backwards. what would the

153. ## physics

Three similar ideal cells (no internal resistances) supply current of 0.5 Ampere to a 10 Ohms resistor when they are in the parallel.How much current will they supply to the same risistor when they are connected in series aiding?

154. ## programming

Create an application in C# that will accept sales information and calculate the total bill. There are 3 products which can be sold: Product 1 with price of \$2.98 Product 2 with price of \$4.50 Product 3 with price of \$9.75 The application should prompt the

155. ## statistics

State the null and alternative hypothesis for the following: 1.) A small local bank wants to check if the average daily balance is not higer than 3500 for its individual saving account. Ho: Ha: 2.) A researcher wants to find out if the mean weekly wage of

156. ## eath science

is moon a source of earth's energy?

157. ## Physics URGENT!!!

Two packing crates of masses 7.93 kg and 5.13 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 5.13 kg crate lies on a smooth incline of angle 40.0°. a) Find the acceleration of the 5.13 kg crate (b)

158. ## science

where can carbon and nitrogen be found? i need 5 different areas of both (1 plant and 1 animal)

159. ## Physics URGENT!!!

Two boxes of fruit on a frictionless horizontal surface are connected by a light string as in the figures below, where m1 = 15 kg and m2 = 17 kg. A force of 58 N is applied to the 17 kg box. (a1) Determine the acceleration of the boxes (b) the tension of

160. ## English

I am writing an evidence paragraph telling what people do to their bodies in order to look good. Make-up, braces, surgery , etc are examples but they are not really "technology". This is what I have so far: Today we have upgraded technology ... Is there

161. ## physics

A car accelerates from rest at a constant rate A for some time after which it retards at a constant rate B to come to rest. If the time elapsed is T second,calculate the maximum velocity reached?(please try solving this problem by plotting velocity time

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162. ## physics

A car accelerates from rest at a constant rate A for some time after which it retards at a constant rate B to come to rest. If the time elapsed is T second,calculate the maximum velocity reached?(please try solving this problem by plotting velocity time

asked by help me out it's urgent
163. ## Physics

a) What is the total force of friction on a wagon’s wheels if it takes 30 N to move it at a constant speed across a bumpy path? b) Where on a bicycle do you want to reduce friction? How is this done? c What is meant by the coefficient of kinetic

164. ## Algebra,Geometry

If 5x-3y-4=4x-2y-12 find x and y. I really just want to know HOW you would find it.

165. ## chemistry

Water from a city well is analyzed and found to contain 25 mg/L of (HCO3)^- and 35 mg/L of (CO3)2^-. Calculate the alkalinity of the water as CaCO3.

166. ## ALGEBRA WRITE EQUATION

FOOD: each variety of apples cost \$1.20/lb at a grocery store. you buy 4lbs of cortland apples and some gala apples for eating. the total cost is \$7.20. how many lbs of gala apples did you buy? i think i got the answer but not sure how to write it in

167. ## Physics

A ball is thrown vertically upward with a speed of 48.5m/s. What is the ball's velocity after 1.50s? ** B). what is the ball's height after 1.5 s?

168. ## civics

what is the freedom of speech?

169. ## PHYSICS

Vector V1 is 6.29 units long and points along the negative x axis. Vector V2 is 4.23 units long and points at +35.0° to the +x axis. (a) what is V1x & V1y (b) what is the magnitude & direction (degrees) ***im confused on what my x & y is to plug into the

170. ## PHYSICS help!!!!!!

A light fixture of mass 10.4 kg is suspended in the corner of a room by a combination of three wires, as shown in the diagram (below, left). If angle θ = 35.0 degrees, find the tension in each of the three wires.

171. ## physics

A crate with a mass of 50 kg has a coefficient of static friction with the floor of 0.8 and a coefficient of kinetic friction of 0.25. If it is pushed with a force of 425 N, how long will it take to move it across a 65 meter horizontal floor?

172. ## PHYSICS

how do i find the magnitude of components of vectors????

173. ## Physics

A man on a 2m high ladder throws a ball in the air with an initial velocity of 22m/s. If the ball is not caught by the man and instead hits the ground, how long was it in the air and how high did it go?

174. ## physics

In open heart surgery a much smaller amount of energy will defibrillate the heart. (a) What voltage is applied to the 9.00 µF capacitor of a heart defibrillator that stores 45.0 J of energy? kV (b) Find the amount of stored charge. mC

A female moth lays nearly 150 eggs. In on year there may live up to five generations. Each larva eats about 20mg of wool. Assume that 2/3 of the eggs die and that 50% of the remaining moths are females. Estimate the amount of wool that may be destroyed b

176. ## physics

need help with this problem A charge of -2.73 uC is fixed in place. From a horizontal distance of 0.0465 m, a particle of mass 9.50 x 10-3 kg and charge -9.56 uC is fired with an initial speed of 97.2 m/s directly toward the fixed charge. What is the

177. ## Physics

A pedestrian moves 5.7 kmeast and then 8 km north. Find the magnitude of the resultant dis- placement vector. Answer in units of km

178. ## Physics

An airplane flies 340 km due east, makes a right-angle turn, and then flies 390 km due north. Find the magnitude of the plane’s displace- ment from its starting point. Neglect the curvature of the earth. Answer in units of km

179. ## physics!

how to i find the magnitude of a vector from v1 and v2

180. ## Physics

A truck travels up a hill with a 10 incline. The truck has a constant speed of 16 m/s. What is the horizontal component of the truck’s velocity? Answer in units of m/s What is the vertical component of the truck’s velocity? Answer in units of m/s

181. ## AP physics

A brick is thrown upward from the top of a building at an angle of 25.1 ◦ above the horizontal and with an initial speed of 19.4 m/s. The acceleration of gravity is 9.8 m/s 2 . If the brick is in ﬂight for 3.5 s, how tall is

182. ## Algebra

Find the difference quotient and simplify your answer. Step by step. f(x) = 3x2 − 6x, f(x + h) − f(x) h , h ‚ 0

183. ## chemistry

A set of bookshelves rests on a hard floor surface on four legs, each having a cross-sectional dimension of 3.9 6.5 cm in contact with the floor. The total mass of the shelves plus the books stacked on them is 260. kg. Calculate the pressure in pascals

184. ## physics

hello, does the density of an element have anything to do with the number of elections? i have to work with a partner and his reasoning is this: "the higher the atomic number, the greater the density because the atomic number is made up of protons so the

185. ## Chemistry

What is the total mass (in grams) of O2 in a room measuring (20.0 5.0 11.0) ft3 if the air in the room is at STP and contains 20.95% O2?

186. ## Earth Science

How energy flows through the Earth's system.

187. ## AP Chemistry

Sulfuric acid (H2SO4) is a very strong diprotic acid. If 0.036 moles of sulfuric acid is mixed with water to make 576 mililiter of solution, what is the molarity of H+?

188. ## Math. i need help!

Assume that each female rabbit of a colony gives birth to three female rabbits. How many female rabbits of the tenth generation will be descendants of a singal rabbit of the first generation?

189. ## Math, due tonight!

Assume that all linear dimensions of an animal increase by 12%. Then the animal will have the same shape. How do the surface area, the volume and the weight (under assumption of constant specific gravity) increase? Give the percentage of the increase.

190. ## PHYSICS

Two lifeguards pull on ropes attached ton a raft. If they pull in the same direction, the raft experiences a net external force of 341 N to the right. If they pull in opposite directions, the raft experiences a net external force of 170 N to the left. Find

191. ## Math

What is 750 lb = to in tons What is 5/14 lbs = to in oz

192. ## physics

The three vectors in the figure below have magnitudes a = 2.45 m, b = 3.15 m, and c = 15.0 m and angle θ = 36.5° find the x and y component of vector a

asked by HELPP assignment Due at 10
193. ## PHYSICS

Sue and Jenny kick a soccer ball at exactly the same time. Sues foot exerts a force of 40.6 N to the north. Jennys foot exerts a force of 84.8 N to the east. What is the magnitude of the resultant force on the ball. Answer in units of N. What is the

194. ## Physics

A ball is attached to a paddle by a rubber band. The ball is initially moving away from the paddle with a speed of 4.0 m/s. After 0.2 seconds it is moving towards the paddle with a velocity of 3.5 m/s. What is the average acceleration in m/s2 during this

195. ## ALGEBRA 1

Determine the equation of combined, then solve for the missing value. Variation x varies directly with y and z. x=5 when y=10 and z=5. find x when y=20 and z=10

196. ## Math

Three consecutive integers have a sum of 357. Fid the integers algebraically. I know the three numbers are 118, 119, and 120 but how do you write it in an algebraic expression ?

197. ## chemistry

1.) a buffer is a substance which: a) donates H+ in acidic solutions b) accepts H+ in basic solutions c) accepts OH- in basic solution d) donates H+ in basic solution e) donates OH- in acidic solution f) accepts H+ in acid solution g) accepts OH- in acid

198. ## science

What are some exaples of elements, atoms,compunds, mixtures, and molecule. Thank you for helping me on this question.

199. ## Physics URGENT!!!

A hockey puck is hit on a frozen lake and starts moving with a speed of 9.7 m/s. 4.1 seconds later, its speed is 7.2 m/s. (c) How far does the puck travel during the time interval?

200. ## calculus

The slope of the curve x^3y^2 + 2x - 5y + 2 = 0 at the point (1,1) is

201. ## physics

Sarah shoots a toy dart vertically downward at 11.7 m/s at Mark standing on the ground below. Calculate the dart's velocity after 0.8 seconds.

202. ## anthropology

Amok (murderous raging) in Malaysian culture, susto (e.g., spirit attack) in Latin America, and fright in Caribbean Creole are all examples of____

203. ## Physics

A superhero flies 235 m from the top of a tall building at an angle of 25  below the horizontal. What is the horizontal component of the superhero’s displacement? Draw the vectors to scale on a graph to determine the answer. Answer in units of m Your

204. ## Math

The treasurer for Kent Enterprises was preparing a bank reconciliation as of October 31, 2010, when the following items were identified: Cash balance per Kent's company records \$32,800 Deposits in transit \$4,300 Outstanding checks \$2,200 Interest earned on

205. ## physics

Sarah shoots a toy dart vertically downward at 11.7 m/s at Mark standing on the ground below. Calculate the dart's velocity after 0.8 seconds.

206. ## cal

The height, h, of a cylinder is 3 times its radius, r. Which of the following represents the rate of change of the volume, V, of the cylinder with respect to its height, h?

207. ## physics!!!

For the vectors with a = 14, b = 13, and c = 365, calculate the following dot products. NOTE theres a picture but i couldn't upload its a right angle triangle with c as the hypt, a bottom and b side

209. ## math

What is the value of the following expression... 2-4+6-8+10-12+14-16+...-100

210. ## Physics

A superhero flies 235 m from the top of a tall building at an angle of 25  below the horizontal. What is the horizontal component of the superhero’s displacement? Draw the vectors to scale on a graph to determine the answer. Answer in units of m Your

211. ## PHI 103 informal logic

One way to disconfirm the scientific hypothesis that chickens cannot fly would be to (Points : 1) ask someone. look very hard for a chicken that can fly. simply assert that chickens can fly. simply assert that chickens cannot fly.

212. ## math

1. five friends are standing in a lone of 7th graders to pick up their class schedules. Laura is the 20th person behind Rayma. Rayma is the 50th person ahead of Deanna. Deanna is the 10th person behind Charlotte. Shelly is the 30th person ahead of Laura.

213. ## College Physics

The ball launcher in a pinball machine has a spring that has a force constant of 1.50 N/cm. The surface on which the ball moves is inclined a = 14.5o with respect to the horizontal. If the spring is initially compressed 4.70 cm, find the launching speed of

214. ## College Physics

If the spring is compressed a distance of 0.150 m and the gun fired vertically as shown, the gun can launch a 27.6g projectile from rest to a maximum height of 16.1 m above the starting point of the projectile. Neglecting all resistive forces, determine

215. ## math

could you help me with these two problems 4(2x-5)-(x-2)

216. ## properties and mental math

use properties and mental math to find the value of (86 + 27) + 3

217. ## cal

determine any values of x for which a tangent line to the curve f(x)=1/x will have a slope of -4

218. ## Algebra1

How many two-digit positive intergers are multiples of both 2 and 5? Is the correct answer 9?

219. ## Intermediate Algebra

Maria drove 3 hours and 30 minutes in a dust storm. When the dust cleared she inccreased her speed by 35 mph and drove for 4 more hours. If she traveled a total of 365 miles, how fast did she drive during the dust storm?

220. ## physics

A 29.0 kg child slides down a long slide in a playground. She starts from rest at a height h1 of 17.00 m. When she is partway down the slide, at a height h2 of 8.00 m, she is moving at a speed of 6.90 m/s. Calculate the mechanical energy lost due to

221. ## physics

A force of 3.4 n is exerted on a 7.8 g rifle bullet.what is the bullet acceleration in m/s^2?

222. ## AP physics

A particle moving uniformly along the x axis is located at 17.9 m at 1.45 s and at 3.9 m at 2.7 s. Find its displacement during this time in- terval. Answer in units of m What is the average velocity speed during this time interval. Answer in units of m/s

223. ## 7/8 Math

Length: 2/6/8/9/10 Breaking Weight 24/16/13/11/9 Explain how your equation shows that breaking weight decreases as length increases. Is this pattern reasonable for this situation? Explain. I used inverse variation equation and found that the equation would

224. ## Mathematics

35ft of rope is equal to how many yards?

225. ## math

is 754 9471 relativly prime people?

226. ## Math

A jar has eight red, nine blue, and ten green marbles. What is the least number of marbles that you can remove from the jar and be certain that you have three of the same color?

227. ## managerial economics

Inter-temporal Price Discrimination. Suppose that technophiles are willing to pay \$400 now for the latest iPhone, but only \$300 if they have to wait a year. Normal people are willing to pay \$250, and their desire to purchase does not vary with time. Ignore

228. ## Chemistry

The oxides of Group 2A metals (symbolized by M here) react with carbon dioxide according to the following reaction: MO(s) + CO2(g)  MCO3(s) A 2.85-g sample containing only MgO and CuO is placed in a 3.00-L container. The container is filled with CO2

229. ## 7/8 Math

what is the value of x in: -x/3 + 4 = 20 Could you guys please tell me how to do it and include the answer. I have other problems like this where x is negative so I just need to know how to do it :) Thanks!

230. ## science (ASAP) PLZ!!

What are some examples of elements, atoms,compounds, mixtures, and molecule. Thank you for helping me on this question

231. ## PHYSICS

Find the capacitance of a parallel plate capacitor having plates of area 1.00 m2 that are separated by 0.400 mm of Teflon.

232. ## Math

What is 128 cups= to in gallons igot 8 gallons i need help

233. ## physics

A dockworker loading crates on a ship finds that a 21-kg crate, initially at rest on a horizontal surface, requires a 70-N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 51 N is required to keep it moving

234. ## PHYSICS

A doubly charged ion is accelerated to an energy of 34.0 keV by the electric field between two parallel conducting plates separated by 2.00 cm. What is the electric field strength between the plates?

235. ## Algebra 1

xWrite the equation so that y is a function of x. -9x + 3y =18

236. ## chemistry

A piston has an external energy of 8.00atm. How much work has been done if the cylinder goes from volume of 0.140 liters to 0.450 liters.

237. ## math

MEghan had 36 books in her locker. Some were library books, text books and the rest were telephone books. THe number of library books and phone books combined equals twice the number of text books. The number of text books and telephone books equals three

238. ## algebra

A board is leaning against a building so that the top of the board reaches a height of 18 feet. The bottom fo the board is on the groung 4 feet away from the wall. What is the slope of the board as a positive number?

239. ## math

what is 5.2 million times 2.6

240. ## geography

Can you please check my answers? 1. Which has more water, The Northern or Southern Hemisphere? The Southern Hemisphere 2. Which of the following is not a peninsula: Baja or Lower California, Panama, or Yucatan? Panama 3. Is the Tropic of Cancer a parallel

241. ## Math

I need to figure out how to make graphs on a computer for a math project. Any help? I need to make histograms, back to back boxplots, and back to back stemplots.

242. ## Biochem

1 ml of whole blood is collected and centrifuged to obtain a plasma sample. The volume of the plasma sample is 600 microlitres. A 1 in 4 dilution of the plasma is made and analysed using a cholesterol assay like the one you performed in the laboratory. 10

243. ## math

A jar has eight red, nine blue, and ten green marbles. What is the least number of marbles that you can remove from the jar and be certain that you have three of the same color?

244. ## physics

According to Kepler's third law, the orbital period T of a planet is related to the radius R of its orbit by T2 R3. A planet's orbit is larger than Earth's by a factor if 3.39. What is the planet's orbital period?

245. ## algebra 114

an investor invested \$800 in two mutual funds. One fund earned 7% and the other earned 3% profit. If the total profit was \$48, how much was invested in each mutual fund.

246. ## calculus

What is the slope of the curve x = cos(y) at the point where y=-pi/3

247. ## chemistry

How many grams of hydrogen can be prepared by treating 2.63 g of iron with 130.0 mL of 1.50 M sulfuric acid solution, to give iron(III) sulfate and hydrogen?

248. ## calculus

Find the equation of the tangent line to the curve x^3 + xy^2 =5 at the point (1,2).

249. ## Calculus II

Calculate the area inside both of the ellipses (x^2)/3 + y^2 =1 and x^2 + (y^2)/3 = 1.

250. ## calculus

f(x)=(x^2+1)(1-x-x^3).Determine the equation of the line tangent to f(x) at the point (1,-2).

251. ## Algebra 1

Solve for x "variable": Rectangle with length of (8x) m and width of (2x) m has a perimeter of 140 m.

252. ## Physics

Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.82 m. The stones are thrown with the same speed of 9.83 m/s. Find the location (above

253. ## physics

A man jogs at a speed of 1.7 m/s. His dog waits 1.4 s and then takes off running at a speed of 3.4 m/s to catch the man. How far will they have each traveled when the dog catches up with the man? Answer in units of m

254. ## pyshic

A car has a mass of 1.35 × 103 kg. If the force acting on the car is 6.82 × 103 N to the east, what is the car’s acceleration? Answer in units of m/s2

255. ## Physics

Two boxes of fruit on a frictionless horizontal surface are connected by a light string as in the figures below, where m1 = 15 kg and m2 = 17 kg. A force of 58 N is applied to the 17 kg box. (a1) Determine the acceleration of the boxes (b) the tension of

256. ## Art

Where are art styles going to lead in the near future

257. ## math

If cos(3 x)6Ó14 x e^2 y=0, find [ dy/dx] using implicit differentiation. In this problem, you should differentiate both sides of this equation with respect to x. First, using implicit differentiation, differentiate the left side of the equation with

258. ## Math.. due tomorrow morning!

Assume that each female rabbit of a colony gives birth to three female rabbits. How many female rabbits of the tenth generation will be descendants of a singal rabbit of the first generation?

259. ## Math.. due soon! help!

A female moth lays nearly 150 eggs. In on year there may live up to five generations. Each larva eats about 20mg of wool. Assume that 2/3 of the eggs die and that 50% of the remaining moths are females. Estimate the amount of wool that may be destroyed b

260. ## Physics

Two charges A and B are fixed in place, at different distances from a certain spot. At this spot the potentials due to the two charges are equal. Charge A is 0.22 m from the spot, while charge B is 0.54 m from it. Find the ratio qB/qA of the charges. Help!

261. ## Statistics

(1.96)(19.08) divided by square root 52

262. ## Math

How do I find (a) f*g (b) g*f (c) f*f of these problems? If you can, please show me step by step ^___^ thank you 1)f(x)=x^2 2) f(x)=3x+5

263. ## Physics

Two packing crates of masses 7.93 kg and 5.13 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 5.13 kg crate lies on a smooth incline of angle 40.0°. a) Find the acceleration of the 5.13 kg crate (b)

264. ## Physics!

need help with this problem A charge of -2.73 uC is fixed in place. From a horizontal distance of 0.0465 m, a particle of mass 9.50 x 10-3 kg and charge -9.56 uC is fired with an initial speed of 97.2 m/s directly toward the fixed charge. What is the

265. ## chemistry

What mass of electrons would be required to just neutralize the charge of 1.4 of protons?

266. ## precalc

# 1 a special window has the shape o a rectangle surmounted by an eqilatera tiangle. ifthe perimeter o the winow is 16 ft, what dimensions will admit te most light (area of triangle= suarre root of 3/4 times x2.

267. ## physics

hello, does the density of an element have anything to do with the number of elections? i have to work with a partner and his reasoning is this: "the higher the atomic number, the greater the density because the atomic number is made up of protons so the