# Questions Asked onJuly 22, 2013

1. ## math

Determine two pairs of polar coordinates for (3,-3) when 0°

2. ## trig

use a half-angle identity to find the exact value of tan 105 degrees.

3. ## trig

Which expression is equivalent to csc x - sin x?

4. ## Physics

A ball is rolled off a table that is 0.481 m above the floor. The ball is rolling with a velocity if 1.8 m/s as it goes off the edge of the table. At the exact instant the first ball rolls off the table a second ball is dropped from the same height. A.)

5. ## operations management

Analysis of the output of a process has suggested that the variability is nonrandom on several occasions recently. However, each time an investigation of the process has not revealed any assignable causes. What are some of the possible explanations for not

6. ## Chemistry 109

How many joules of heat are required to raise the temperature of 225 g of water from 42 degree celcius to 75 degree celcius?

7. ## math

tap a was turned on to fill a rectangular tank of 50cm by 40cm by 28cm with water at a rate of 6 liters per minute. after 2 minutes, tap b was turned on to drain water from the tank at a rate of 2 liters per minutes. 6 minutes after tap b was turned on,

8. ## Driver's Ed

Driver's licenses can not be suspended for more than 365 days. A) True. B) False. In 2002, two out of every three drivers under the age of 21, involved in a single vehicle crash, were killed at night. A) True. B) False.

9. ## trig

A bird at the top of a tree looks down at a field mouse with an angle of depression of 65 degrees. If the field mouse is 30 meters from the base of the tree, find the distance from which the field mouse to the bird's eyes. Round the answer to the nearest

10. ## math

Express the complex number 8(cos30 degrees + i sin30 degrees)sin in complex in the form a+bi

11. ## algebra

a baby weight only 9.9 ounces at birth. how much lighter was she than an average baby who weighs about 7 lb 8 ounces

12. ## Math

if x is r percent of y and if k is s percent y, then x is what percent of k? 100(r+s)% 100/rs% 100r/s% 100s/r% rs/100%

13. ## Chemistry

how do you draw a Lewis structure for lithium chlorine

14. ## Chemistry

An artifact has a carbon-14 to carbon-12 ratio that is one-fourth the carbon-14 to carbon-12 ratio of a similar modern object. How old is the artifact? (The half-life of carbon-14 is 5,715 years.)

15. ## math

The difference between Sally’s PE mark and science mark is 12, and the sum of the marks is 154. If the PE mark is the larger mark, what did Sally get for each subject?

16. ## Chemistry

A piece of wood found in an ancient city has a carbon-14 to carbon-12 ratio that is one-eighth the carbon-14 to carbon-12 ratio of a tree growing nearby. How old is the piece of wood? (The half-life of carbon-14 is 5,715 years.)

17. ## world geography

Why are some bodies of water in Russia unnavigable for part of the year? They are frozen. They are too shallow. They are too swift. They contain chernozem.

18. ## statistics

A government researcher wants to conduct a study to determine if there is a correlation between social security numbers and income. He collects the paired data from a random sample of 100 people. Should the methods of this chapter be used with the linear

19. ## physics

You prefer soft-boiled to hard-boiled eggs, but you hate waiting next to your eggs to check if they're cooked. Therefore, you want to determine how often do you need to check the eggs so that they're not overcooked. What time does it take in minutes for a

20. ## statistics

Suppose that two employees have to be fired from a group of seven: • Amy, female, age 35 • Bob, male, age 41 • Chad, male, age 43 • Diana, female, age 44 • Elvis, male, age 49 • Frank, male, age 61 • Ginger, female, age 62 Determine the

21. ## physics

(a) A rectangular gasoline tank can hold 41.0 kg of gasoline when full. What is the depth(m) of the tank if it is 0.400 m wide by 0.900 m long? (b) What is the volume(gal) of the tank? (It is suitable for a passenger car.)

22. ## Data Structures and Algorithms

The "random" numbers produced by computers aren't purely random. They are actually pseudo-random, meaning that they are produced by mathematical formulas that simulate randomness.The linear congruential generator takes a seed X0 and generates subsequent

23. ## physics

You prefer soft-boiled to hard-boiled eggs, but you hate waiting next to your eggs to check if they're cooked. Therefore, you want to determine how often do you need to check the eggs so that they're not overcooked. What time does it take in minutes for a

24. ## finance (math)

You think that in 15 years it will cost \$214,000 to provide your child with a 4-year college education. Will you have enough if you take \$75,000 today and invest it for the next 15 years at 5%?

25. ## chem

A beaker with 120mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 5.70mL of a 0.450M HCl solution to the beaker. How much will the pH change? The

26. ## Math

in a league with 6 teams each team is scheduled to play each other team exactly twice. what is the total number of games that are scheduled in the league?

27. ## chem

The speed of your ship in still water is 20 knots.Your ship traveled 70 miles downward in channel in the same amount of time it traveled 45 miles upward the channel.Calculate the rate of the channel current.

28. ## math

63 inch pipe is cut in to two pieces. one piece is two times the length of the other. what is the length of the two pieces.

29. ## general physics

A semi-trailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway truck ramp that is inclined at an angle of 13.0° above the horizontal. The semi-trailer coasts to a stop after traveling 190 m along the

30. ## math

Sorry I'm posting so many. I'm on a schedule and panicking. Which is the distance between the point with the coordinates (1,2) and the line with the equation 2x-3y=-2?

31. ## Physics

You decide to make a simple pendulum by attaching a bowling ball to a very light wire and suspending it from the ceiling in your garage. The length of the wire is 1.75 m and the mass of the bowling ball is 5 kg. If you pull the bowling ball back an angle

32. ## Thermodynamics of steam

A boiler furnace releases 10000.000kJ of heat for each kg of fuel burned and produces dry saturated steam at 10000.000kPa from feed water at 190.000 degrees Celsius. How many kg of steam will be produced for each kg of fuel burned if the boiler had an

33. ## algebra

24x^6 -12 x^3 divided by 4x^3

34. ## Physics

A 2kg mass is attached to a spring of spring constant 20N/m. At t=0 the spring is at its relaxed position and the block is moving with a velocity of 4m/s to the right. Assume the positive direction is to the right. What is the speed of the mass when it is

35. ## Karnataka state university

A baThe power developed by a man in riding up a 6 percent grade at a constane speed is 200 W the man and his bicycle have a combined mass of 80 kg.Determine the speed of rding

36. ## physics

You prefer soft-boiled to hard-boiled eggs, but you hate waiting next to your eggs to check if they're cooked. Therefore, you want to determine how often do you need to check the eggs so that they're not overcooked. What time does it take in minutes for a

37. ## Physics

a yellow lamp emits light with a wavelength of 6.00E-7 meters. Calculate the frequency of the yellow light.

38. ## dynamics

1.The powr developed by a force is --- and that of couple is --- 2. The velocity of cylinder which is released from rest on 0 degree incline after it has rolled through a distance l is given by --- 3.The conditions for none slipping are ------ 4. The

39. ## Dynamics

Multiple chice question. 1. The co efficent of restitution is defined on the basis of a.Velocity component along the line of impact only. b.Velocity compnent normal to the line of impact c.Velocity vectors before and after the collision. d.Energies of

40. ## Ideas

What are some things to create in a community that would be good to have? (I would appreciate it if you gave me a list of different places that I can choose from)

41. ## Marketing

Please check my grammar, sentence structure and how the references are places. Running Head: MARKETING MIX PROJECT Marketing Mix Project Natashia Johnson Keiser University MARKETING MIX PROJECT Marketing Mix Project I chose the product Banana Colada Fuze

42. ## geometry

A cross country race course on flat ground has runners heading from point A for 3.5 km on a bearing of 047degT to point B. From point B they turn and run for 2.8 km on a bearing of 342degT to point C. They then run back to point A. Determine the Distance

43. ## Math Statistics

3. Suppose 20% of all heart transplant patients do not survive the operation. a. Think about taking repeated random samples of 371 patients from this population. Describe how the sample proportion who die would vary from sample to sample. (Hint: Be sure to

44. ## math

how much would need to be invested at 3.25% annual simple interest to amount to \$6510 in 5 years?

45. ## physics

A 2.60 kg steel gas can holds 15.0 L of gasoline when full. What is the average density(kg/m^2))of the full gas can, taking into account the volume occupied by steel as well as by gasoline?

46. ## Statistics

True or False Question. I need help please. A sientific paper reports the results of a drug test. This medicine used to reduce vision loss in people suffering from macular degeneration. The article state p = 0,04 section findings. The following issues are

47. ## Maths B

Kate is thinking about investing \$45000 for 5 years. She deposits her money into an account which earns interest paid quarterly at a rate of 3.99% p.a. After 1½ years, Kate withdraws her investment (including interest) and deposits the full amount into a

48. ## Chemistry

calculate the natural logarithm and reciprocal concentration at 0 seconds and NO2 concentration (M) of .8333 and at time 20 (seconds) and .4617 NO2 concentration (M)

49. ## Physics

A particular brake design can apply a force of 2000 N. If you wish to have a deceleration of 5m s1, what is the largest car weight you can use with this design?

50. ## finance (math)

If you inherited \$25,000 today and invested all of it in a security that paid a 7% rate of return, how much would you have in 25 years?

51. ## finance (math)

If the average new house costs \$210,000 today, how much will it cost in 10 years if the price increases by 5% each year?

52. ## finance (math)

If you can earn 5%, how much will you have to save each year if you want to retire in 35 years with \$1 million?

53. ## Cultural Diversity

If you were to introduce yourself by the ethnic, racial, or other identities to which you feel you belong, what would you say? Do you consider yourself a “typical” American? I have no idea how to present this to others any ideas out there?

54. ## dynamics

The coefficients of friction depends upon

55. ## dynamics

the power developed by a man in riding up a 6 percent grade at a constant speed is 200w. the man and his bicycle have a combined mass of 80 kg. Determine the speed of riding

56. ## dynamics

a 1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s if the driver wishes to stop his car in a distance of a 5m, determine the frictional force at pavement which must be supplied by rear wheels.

57. ## dynamics

fill in the blanks---- a)the power developed by a force is ______ and that of couple is _______. b)the velocity of cylinder which is released from rest on 0 degree incline after it has rolled through a distance l is given. c)the conditions for non slipping

58. ## Chemistry

I posted this before and am sorry to post again and take up room but it is due this week and I'd like to understand how to get the answer (no one has responded yet): question The nuclide 38cl decays by beta emission with a half life of 40min. A sample of

59. ## dynamics

A ball of mass 8 kg is thrown vertically upward from the ground, with an initially velocity of 25 m/s. determine the maximum height to which it will travel if atmospheric resistance is neglected.

60. ## Dynamics

A 1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s. If the driver wishes to stop his car in a distance of 5m,determine the frictional force at pavement which must be supplied by rear wheels.

61. ## stats

I am having a bit of trouble with some of the questions. Some of the ones I put below have an answer, is there anyway you can check the answer and help me with the rest I am having trouble with. Your sociology teacher claims that 60 percent of American

62. ## stats

I am having a bit of trouble with the top half of the questions. I have an answer below for questions 5-10, is there anyway you can check those answers and help me with the rest I am having trouble with. Thank you. 1. The area to the right of 1.93 under

63. ## chemistry

What volume in ml of 0.0985 m NaOH solution is required to reach the end point in the complete titration of a 15.0 ml sample of 0.124 M phosphoric acid?

64. ## Finance

If upon retirement in 20 years Simon plans to invest \$400,000 in a fund that earns 5%, what is the maximum annual withdrawal he can make over the following 15 years?

65. ## dynamics

A 1500 kg automobile is treveling upto 20 degree incline at a speed of 6 m/s. if the driver wishes to stop his car in a distance of 5 m, determine the frictional force at pavement which must be supplied by rear wheels.

66. ## Physics

200 g of ic is at -5C is dropped into a container containing water at 65C. If the final temperature of the mixture reaches 21C, what mass of water must be present in the container?

67. ## BTech, Mechanical

A ball is thrown vertically upward with velocities of 18 m/s. Two seconds later another ball is thrown upwards with a velocity of 13.5 m/s. At what position above the ground will they meet?

68. ## Dynamics

A 1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s. If the driver wishes to stop his car in a distance of 5m,determine the frictional force at pavement which must be supplied by rear wheels.

69. ## Dynamics

the power developed by a man in riding up a 6 percent grade a ta constant speed is 200 W. the man and his bicycle have acombind mass of 80kg.determine the speed of riding.

70. ## physics (fluids)

If a object of radius 3 cm is attached to the ground in a 3 m deep sea, what is the vertical force in N with which the water (density = 1000 kg/m^3) presses on it?

71. ## life orientation

5 ways in which the human problem impact on the communi

72. ## socials 11 (health care in canada)

explain what increased privatization of the healthcare would entail, and then list the pros and cons of such a system

73. ## socials 11 (health care in canada)

why is health care a growing concern for Canadian citizens?

74. ## Driver's Ed

The lower the speed, the less time the driver has to spot dangerous situations and take action. A) True. B) False.

75. ## English Composition 1

I need to change the syle of writing from a chapter in a book. From whatever syle it is written in to one of, gothic romance, pulp fiction or horror story. I don't know how to write in any of those styles, I don't know how to write!

76. ## MT

He has, on physical examination, many erythematous actinic keratosis still present on the forearm. They are flat, but these are much less than before. He has, in addition, on his buttocks, 2 lichenified areas of erythema bilaterally on the buttocks where

77. ## MT

He has Diabetes type two. The patient's hemoglobin A1C is currently too high. We will plan to convert him from Glyburide to Glucotrol X-L.

78. ## science

You throw a ball upward with an initial speed of 10 m/s. Assuming that there is no air resistance, what is its speed when it returns to you?

79. ## chemistry

To half of it (500. mL), you add 0.0100mol of hydrogen ions without changing the volume. What is the pH of the final solution?

80. ## Trig

Find all solutions in the interval 0 degrees

81. ## chemistry

I have this on my homework but cannot fine any examples in the book or my notes that relate to a problem set up this way, can you help? What are the concentrations of OH– and H in a 0.00078 M solution of Ba(OH)2 at 25 °C? Assume complete dissociation.

82. ## Calculus-HELP PLZ !!!!

Find the complete general solution to the 2nd ODE: 9y'' + 9y' - 4y = 0

83. ## chem 223

What additional volume of 10.0 M HCl would be needed to exhaust the remaining capacity of the buffer after the reaction described in Part B?

84. ## general physics

An automobile has a mass of 1520 kg and a velocity of 19.7 m/s. It makes a rear-end collision with a stationary car whose mass is 2230 kg. The cars lock bumpers and skid off together with the wheels locked. (a) What is the velocity of the two cars just

85. ## Gen physics

Two balls are approaching each other head-on. Their velocities are +11.9 and -10.5 m/s. Determine the velocity of the center of mass of the two balls if (a) they have the same mass and (b) if the mass of one ball (v = 11.9 m/s) is twice the mass of the

86. ## Gen physics

A 0.662-kg basketball is dropped out of a window that is 6.32 m above the ground. The ball is caught by a person whose hands are 1.82 m above the ground. (a) How much work is done on the ball by its weight? What is the gravitational potential energy of the

87. ## physics

Starting from rest, a 1.6x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.38 N on it. This force does 2.6x10-4 J of work on the flea. (a) What is the flea's speed when it

88. ## general physics

A cable is lifting a construction worker and a crate, as the drawing shows. The weights of the worker and crate are 833 N and 1380 N, respectively. The acceleration of the cable is 0.620 m/s2, upward. What is the tension in the cable (a) below the worker

89. ## Gen physics

A truck is traveling at a speed of 33.1 m/s along a level road. A crate is resting on the bed of the truck, and the coefficient of static friction between the crate and the truck bed is 0.632. Determine the shortest distance in which the truck can come to

90. ## gen physics

A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. The student has a mass of 82 kg, and the height of the water slide is 11.3 m. If the kinetic frictional force does

91. ## physics

A 50.7-g golf ball is driven from the tee with an initial speed of 51.2 m/s and rises to a height of 21.8 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 6.55 m below its

92. ## statistic

a numerical value for a correlation can never be

93. ## science

If the Ka of a monoprotic weak acid is 8.3 × 10-6, what is the pH of a 0.28 M solution of this acid?

94. ## science

You are given three displacement vectors: with magnitude 5.0 m in the direction of 60o below the negative x-axis, vector, has an x-component of +2.5 m and a y-component of +6.0 m and vector has magnitude of 2.5 m in the negative y-axis.

95. ## science

You are given three displacement vectors: with magnitude 5.0 m in the direction of 60o below the negative x-axis, vector, has an x-component of +2.5 m and a y-component of +6.0 m and vector has magnitude of 2.5 m in the negative y-axis. Find the vector so

96. ## algebra

how do I simplify the fraction? 2 3√18 ( 3 is the power, small number) 6

97. ## math

Solve the equation for 0

98. ## trig

Write the standard form of the equation where p=π and o=7π/12