# Questions Asked onJune 17, 2012

1. ## science

an arrow is shot into air. its range is 200m and its time of flight is 5s . if g=10m/s2 ,then horizontl compoent of velocity and the mximum height will be

2. ## Physics Gravity

A projected space station consists of a circular tube that will rotate about its center (like a tubular bicycle tire) as shown in the figure . The circle formed by the tube has a diameter of about 1.1-km g = R w^2 = 9,8 m/s^2 R = 550 m How do I convert the

3. ## physics

a gun is fired from a distance of 1.2 km from a hill.the echo of the sound is heard after 7.1 seconds at the same place. Calculate the velocity of sound.

4. ## physics

to an observer the pitch of the stationary source of the sound appears to be reduced by 20% if speed of sound is 340m/s then sped and direction of 5he observer is options 1.68 m/s away from the observer 2.96 m/s away from the observer

5. ## math

You must cover a hole that is elliptical in shape. You measure the major and minor axes and find them to be 6 ft. and 4.5 ft. respectively. If you want a 6 inch overhang around the hole, how much covering will you need? (Round to the tenths place.)

6. ## physics

A 0.40kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 2.1m on a frictionless horizontal surface.If the cord will break when the tension in it exceeds 80N , what is the maximum speed the ball can have?

7. ## Finance

Aset P has a beta of 0.9. The risk-free rate of return is 8%, while the return on the S&P 500 is 14%. Asset P's required rate of return is:

8. ## Physics help!!!

What potential difference is required in an electron microscope to give electrons a wavelength of 0.05 nm ?

9. ## math

A car has a 12 volt battery. The engine has a resistance of 0.22 ohms. How many amps will be drawn from the battery when the key is turned?

10. ## Physics

How much energy is required to move a 900 kg object from the Earth's surface to an altitude twice the Earth's radius?

11. ## Physics

Planet Jupiter revolves around the Sunin 12 years (3.79 X 10^8 sec. What is its mean distance from center of Sun? mass of sun is 1.99 x 10^30 kg.

12. ## Chemistry

How much heat is liberated when 0.113 mole of sodium reacts with excess water according to the following equation? DH = -368 kJ/mol rxn

13. ## statistics

A biologist reports a confidence interval of (3, 2, 3, 8) when estimating the mean height in (in centimeters) of a sample of seedlings. The estimated margin of error is __________ , The sample mean is ________.

14. ## math

how to write 9.035 in expanded notation

15. ## Physics help

A 0.50-kg block rests on a horizontal, frictionless surface, it is pressed against a light spring having a spring constant of k = 800 N/m, with an initial compression of 2.0 cm. To what height h does the block rise when moving up the incline? what would be

16. ## chinese

translate these sentences-: 1 i am not free. 2 good bye i'll see you later. 3 hello how are you? 4 don't disturb me, let me study. 5 may you please give me this book.

17. ## Physics

A mass is stretched 4cm from equilibrium position of a spring. If the displacement is doubled, what can be concluded about the restoring force? A. It halved. B. Same C. Increased by 4 D. Decreased by 4

18. ## Physics

A 3.30-kN piano is lifted by three workers at a constant speed to an apartment 28.8 m above the street using a pulley system fastened to the roof of the building. Each worker is able to deliver 197 W of power, and the pulley system is 75.0% efficient (so

19. ## math

what percent of 67 is 33? round to the nearest tenth of a percent. the answer is 49.3% but i don't know how he got that can you explain

45. ## science

describe the mixture that resulted after mixing.

46. ## statistics

39% of households have some sort of high speed internet service. 15 homes are selected at random. the probability that 5 homes will have high speed service is?

47. ## Chemistry

The density of a liquid is 3.22 g/mL. How many milliliters are there in 2.62 kg? If you answer this could you give me an explanation of how to solve it in the future

48. ## Physics

Two boxes, mass 4.0 kg and 5.0 kg are set next one another on a frictionless surface. The first box is pushed with a force of 35 N. What normal forces does the second box exert on the first box during this process? (ans: 19 N) How do you do this question?

49. ## Physics

What is the typical wavelength of an X-ray ? I searched google and I couldn't find it. If you know the answer I'd appreciate it .

50. ## Physics

1) How much longer would it take for light to travel through 1.0 km of water than 1.0 km of air? What formula do you use? The answer is 1.1 x 10^-6 s 2) The acetate roll on overhead projector is placed at a distance 1.2f from the lens. (where f is the

Would you invest in the company you reviewed based on the information contained in the annual report? Why or why not? Please list examples to support your answer.

52. ## algebra

How many units were produced in APRIL? What is the length of the rod AB to the nearest quarter inch?

53. ## Math

Contract the expressions. In (3) - 2 In (4)+ In (8)= In (3) - 2 In (4+8) = In (3) - 2 (In (4) + In (8) ) =

54. ## Math

Graph the equation X = 1/2 y2

55. ## finance

You currently have $22,500 in your retirement account. What annual rate of return will you need to make on your investment in order to have$1,000,000 in the account on your 60th birthday? Will investing in CDs get you to your goal?

56. ## Math

Graph the line Y = 5x + 6

57. ## english

1. There should be commas around “however” in the following sentence: “Dwayne had planned to take the last flight out to Chicago. It was cancelled, however, because of bad weather.” (Points : 1) True False

58. ## Physics

1. A 2.5kg rock is dropped from a 350m cliff. It hits the ground with a speed of 60 m/s. What percent of its mechanical energy was lost to air resistance? -the answer is 48% 2. A motor uses 5500J to lift a 35kg object a vertical distance of 12m. What is

59. ## chemistry

A 1.50 liter gas sample at 745mm HG and 25 celsius contains 3.55% radon by volume radon-220 is an alpha emitter with a half life of 55.6 seconds. how many alpha particles are emitted in 5 minutes by this sample? I got an answer 1.59x10^19 I started at

60. ## Math

solve the equation, 2D + 3 = 13, 12E - 3 = 0

61. ## math

I need help with this problem: finding the instantaneous rate of change of y with respect to x at the point x=5 if y=x^2/2+3/5x-1 I know I am suppose to find the determinant first then plug in 5...but I am not sure about the determinant

62. ## Physics

Anyone can help me with these questions: 1. BC Hydro charges $5.91 per kWh. How long does it take a 100 W light bulb to use up$1.00 of energy? (answer = 1.7h) 2. A small bag of chips contains 230 Calories (1000 calories = 1 calorie = 4.19 kJ). To what

63. ## math

complete these series,1,8,27,64,___,____

64. ## math

complete these series,1,8,27,64,___,____

65. ## physics

a source of sound id traveling towards a stationary observer .The frequency of sound is heard by the observer is 25% more that the actual frequency.If the speed of sound is v,that of the source is options: 1.v/4 2.v/5

66. ## logic

If P is true, and Q is false, the truth-value of "P v Q" is

67. ## Foreign languages

Writeacher, could you please check these sentences? Thank you. 1) I'm forwarding you the link to the requirements for next year's Comenius exchange programme. I really hope to receive some good news from you. 2) We are looking for a hotel accommodation for

68. ## Math

A square garden plot measures 180 square feet. A second square garden plot measures 405 square feet. How many more feet of fence will the second garden plot require over that required for the first garden plot. But how did they get this???????

69. ## Math

how do you solve: 4=1(2)/(x-2) Thank you!

70. ## physics

Using Coulomb's Law, calculate the force of repulsion between a positive charge of 110 Coulombs and another positive charge of 220 coulombs separated by a distance of 2 meters. Use scientific notation. (Hint: use the proportionality constant)

71. ## Homework test

An artifact was found and tested for its carbon-14 content. If 70% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

72. ## Physics

Why "weighing" individual atoms is a particular challenge? Using A small beam arranged as a cantilever, can be utilized as part of a sensing device.

73. ## Chemistry

How much heat is liberated when 0.113 mole of sodium reacts with excess water according to the following equation? DH = -368 kJ/mol rxn

74. ## prealgebra

Evaluate showing work (23 - 3) ÷ (-5)

75. ## pre algebra

(0.43 - 0.18) X 4 evaluate please show how its done

77. ## chemistry

Calculate the residence time of sodium in millions of years if the total amount of sodium in the oceans is 1.5 x 10 to the 22 grams, and is supplied to the ocean at a rate of 2.2 x 10 to the 14 grams per year.

78. ## geometry

write the statement in symbols using the p and q given below. Then construct a truth table for the symbolic statement and select the best match. p= The mouse is in the house q= The cat is hungry.

79. ## physics

Archimedes decides to take a warm bath. If 1 calorie equals 4.187 Joules, and the heat of fusion of ice/water is 334 J/gram, calculate the number of calories it takes to liquefy a solid block of ice of mass 100 kg at 0°C. Use scientific notation.

80. ## math

How many hours is it between 2135 hundred military time and 1325 hundred ?

81. ## physics

Using Coulomb's Law, calculate the force of repulsion between a positive charge of 110 Coulombs and another positive charge of 220 coulombs separated by a distance of 2 meters. Use scientific notation. (Hint: use the proportionality constant)

82. ## pre algebra

7x 11 – 42 evaluate show its done please my answer I got is 35

83. ## french

i want to learn this language. Please write some french sentences and also translate them into english. Please earlier, its very urgent.

84. ## Chemistry

Nitrogen gas and sodium liquid are produced by the decomposition of sodium azide NaN3 (s). what volume of nitrogen gas, measured at 25 C and 0.980 atm, is produced by the decomposition of 62.5 g of sodium azide

85. ## Calculus

evaluate the limit: lim cos(x + pi/2)/x x->0

86. ## Biology Lab

Can you please show me how to answer this question using C1V1=C2V2 A scientist receives a vial containing a protein at at concentration of 35mg/ml and is asked to add 0.25ml of it to 6.75mls of Biuret solution. What is the concentration of protein in the

87. ## spanish

please translate these sentences into spanish-: 1.how are you? 2don't disturb me? 3.i want to drink something. 4.oh, i got it. 5. I want to do my work. 6.please be quite.

88. ## organic chemistry

how to calculate the % oil of thyme in thyme ? We did an experiment titled : the extraction of Thymol in thyme oil and the prof wants us to calculate the % oil of thyme in thyme... how do I do that ? Thanks

89. ## organic chemistry

how to calculate the % oil of thyme in thyme ? We did an experiment titled : the extraction of Thymol in thyme oil and the prof wants us to calculate the % oil of thyme in thyme... how do I do that ? Thanks

90. ## pre algebra

11 - 8 ÷ (1/3 + 1/5) Please show work I am stuck. Thank you

91. ## organic chemistry

how to calculate the % oil of thyme in thyme ? We did an experiment titled : the extraction of Thymol in thyme oil and the prof wants us to calculate the % oil of thyme in thyme... how do I do that ? Thanks

92. ## Physics

What is the maximum speed with which a 1150-kg car can round a turn of radius 71 m on a flat road if the coefficient of static friction between tires and road is 0.80? May someone walk me through this problem step by step? Thank you *The equation friction

93. ## Geometry

Ida plans to construct a square showing exact measurements of the sides. Which combination of tools would best help Ida construct the square?

94. ## Physics

A 13.0 -kg box is released on a 33 degree incline and accelerates down the incline at 0.20 m/s^2 What is the coefficient of kinetic friction? * If I know the friction force impeding the object motion is 67 N. How do I find the coefficient of kinetic

95. ## math

This is confusing: This proportion can be changed to (0.45)y = x, where x represents the person's weight in kilograms and y represents the person's weight in pounds. The recommended protein in grams is numerically equal to the person's weight in kilograms.

96. ## math

11 - 8 ÷ (1/3 + 1/5) I need to know how to to this please show me. Thank you

97. ## Physics ( light)

A student doing Young's experiment measures a distance of 6.0 cm between the first and seventh nodal points on a screen located 3.0 m from the slit plate. a) if the slit seperation is 220^ -6, what is the wave length of light being used ? b) what colour is

98. ## Calculus

derivative of y=tan^3(x)

99. ## Chemistry

Hi everyone, I really need help with this problem. What is the reactant, products, and what compounds is it? Is it H2O, O2, or what? What are the transition molecules? Help please. Do as below to get to the image. I couldn't put the URL in and it isn't my

Grocery, Inc., is a retail grocery store chain based in Any State, U.S.A. and has stores throughout the United States. Grocery, Inc. has written contracts with many different vendors to purchase the products they sell in their stores. Vendors range from