# kristy

Popular questions and responses by kristy
1. ## physics

You testify as an expert witness in a case involving an accident in which car A slid into the rear of car B, which was stopped at a red light along a road headed down a hill (see the figure). You find that the slope of the hill is θ = 14.0°, that the

2. ## math

Heather is solving an equation by graphing the expressions on both sides. If her graph intersects at an infinite number of points, which statement could describe the equation Heather is attempting to solve? A. One side of the equation is a constant, and

3. ## physics

A rock is dropped from a 196-m-high cliff. How long does it take to fall (a) the first 98.0 m and (b) the second 98.0 m?

4. ## math

Textbook prices have a seasonal structure on Ebay. At the end of a term, the supply of used books outstrips demand, and the price is lower. Near the start of a term, many students are looking for books, and the price is higher. Suppose we can classify

5. ## algebra 2

the soccer club has planned a trip to a tournament. the cost of the van is $231 when 3 students who are not members of the club join the trip, the transportation cost per person drops by$4.50 how many soccer members are going to the tournament?

6. ## Math

The Wilson family was one of the first to come to the U.S. They had 9 children. Assuming that the probability of a child being a girl is .5, find the probability that the Wilson family had: at least 2 girls? at most 3 girls?

Ruth carelessly parks her car on a steep hill, leaving the car in neutral and failing to engage the parking brake. The car roles down the hill, knocking down an electric line. The sparks from the broken line ignites a grass fire. The fire spreads until it

8. ## physics

A lowly high diver pushes off horizontally with a speed of 2.75 m/s from the edge of a platform that is 10.0 m above the surface of the water. (a) At what horizontal distance from the edge of the platform is the diver 0.866 s after pushing off? (b) At what

9. ## To be or not to be speech

What literary devices are used in "To be or not to be that is the question" from Hamlet? I have to analyze the speech and I would like to know if my interpretation is correct. Hamlet is talking to himself and he is debating whether he wants to live or not

10. ## investing

You have a $2 million portfolio consisting of$100,000 investment in each of 20 different stocks. The portfolio has a beta of 1.1. You are considering selling \$100,000 worth one stock with a beta of 0.9 and using the proceeds to purchase another stock

11. ## astronomy

If we represent the sun as volleyball (diameter =65cm)how far away would be find earth in this model? Note the suns actual diameter is 1.4x10^9 meters.

12. ## economics

. Predicting Consequences Use the table below to predict what would happen if airlines and baseball stadiums priced all seats the same instead of using variable pricing. What would happen to the number of tickets sold? What would happen to the total

13. ## physics

In the figure, two skaters, each of mass 58.0 kg, approach each other along parallel paths separated by 2.79 m. They have opposite velocities of 1.50 m/s each. One skater carries one end of a long pole of negligible mass, and the other skater grabs the

14. ## Math

Solve for P: A = P + nrP

15. ## English

what is the subject complement in the following sentence? Rachel is a graduate

16. ## Algebra II

The volume of a gas in cubic centimeters, V, varies inversely with the pressure of the gas in liters per square centimeter, p. When the volume of the gas is 16 cm3, its pressure is 20 L/cm2. Find the volume of the gas when the pressure is 2.2 L/cm2.

17. ## physics

Suppose that a shot putter can put a shot at the worldclass speed v0 = 14.00 m/s and at a height of 2.160 m. What horizontal distance would the shot travel if the launch angle θ0 is (a) 45.00° and (b) 42.00°? The answers indicate that the angle of 45°,

18. ## algebra 2

according to the graph of h(w) (5.0,20.00) below, what happens when w gets very large?

19. ## physics

A rock is shot vertically upward from the edge of the top of a tall building.The rock reaches its maximum height above the top of the building 1.90 s after being shot. Then, after barely missing the edge of the building as it falls downward, the rock

20. ## algebra 2

An object's height varies directly with the length of its shadow. A person who is 5 feet tall casts an 8-foot shadow. How long is the shadow of a 20-foot tree?

21. ## phyiscs

A bolt is dropped from a bridge under construction, falling 81 m to the valley below the bridge. (a) How much time does it take to pass through the last 28 % of its fall? What is its speed (b) when it begins that last 28 % of its fall and (c) just before

22. ## probability

if a fair coin is tossed 4 times, what is the probability of getting heads the first 3 times, and tails the fourth itme?

23. ## chemistry

An atom has a valence shell configuration of ns2p5. To which group of elements in the periodic table does it belong? transition metals Halogens alkaline earth metals alkaline metal

24. ## chemistry

A 100.0 ml sample of 0.300 M NaOH is mixed with a 100.0 ml sample of 0.300 M HNO3 in a coffee cup calorimeter. Both solutions were initially at 35.0 degrees celcius; the temperature of the resulting solution was recorded at 37.0 degrees celcius. Determine

25. ## OChem

Anhydrous conditions are vital for a successful Grignard synthesis. To demonstrate this point calculate the mass of the water it would take to destroy the phenylmagnesium bromide you will synthesize. What is he volume of this amount of water? -How exactly

26. ## physics

At one instant a bicyclist is 58.0 m due east of a park's flagpole, going due south with a speed of 13.0 m/s. Then 35.0 s later, the cyclist is 58.0 m due north of the flagpole, going due east with a speed of 13.0 m/s. For the cyclist in this 35.0 s

27. ## astronomy

a remote internet webpage may sometimes reach your computer by going through a geostationary satellite orbiting approx. 3.6x10^7m above earths surface. What is the minimum delay in seconds that the webpage takes to reach your computer.

28. ## Chemistry

How many pi bonds and sigma bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

29. ## math

The probability a car salesman sells a car to a customer is 0.05 Assuming the salesmen sees 14 customers in a week, what is the probability he sells less than 2 cars?

30. ## math/probability

About 4% of the population has a particular genetic mutation. 700 people are randomly selected. Find the standard deviation for the number of people with the genetic mutation in such groups of 700.

31. ## physics

A 68 kg man is ice-skating due north with a velocity of 5.6 m/s when he collides with a 42 kg child. The man and child stay together and have a velocity of 3.0 m/s at an angle of 35° north of due east immediately after the collision. What are (a) the

32. ## chemistry

How many grams of H2 are needed to produce 10.75g of NH3?

33. ## physics

A stone is dropped into a river from a bridge 45.4 m above the water. Another stone is thrown vertically down 1.14 s after the first is dropped. Both stones strike the water at the same time. What is the initial speed of the second stone?

34. ## physics

As a contrast between the old and the modern and between the large and the small, consider the following: In old rural England 1 hide (110 acres) was the area of land needed to sustain one family with a single plough for one year. (An area of 1 acre is

35. ## chemisry

Calculate the density in g/mL {\rm g}/{\rm mL} of 2.0L {\rm L} of gasoline that weighs 1.29kg kg . Express your answer to two significant figures and include the appropriate units

36. ## Math

Mike had some pieces of wood to build a doghouse. He cut each piece in fourths. Then he had 24 pieces of wood. How many whole pieces of wood did Mike have to start with?

37. ## Calculus

At noon, ship A is 180 km west of ship B. Ship A is sailing east at 40 km/h and ship B is sailing north at 30 km/h. How fast is the distance between the ships changing at 4:00 PM?

38. ## trig

Use the appropriate cofunction to find an equivalent expression for cos 54° cot 24 sec 32 sin 36 csc 44

39. ## Art

If you wish to balance complementary colors so that they'll appear static and harmonious, it's important to ? http://www.applepainter.com/Chap05/ and http://www.tigercolor.com/color-lab/color-theory/color-theory-intro.htm These two sites should help you

40. ## math

x P(x) 0 0.3 1 0.3 2 0.2 3 0.2 Find the mean of this probability distribution. Round your answer to one decimal place.

41. ## math/probability

The following is a table of probabilties calculated from a survey of BHCC students with the question asked "How many classes are you taking this semester?" x: # of classes 1 2 3 4 5 P(x) 0.23 0.27 0.13 0.33 0.04 Using the table, find the following

42. ## math

The probability a car salesman sells a car to a customer is 0.05 Assuming the salesmen sees 14 customers in a week, what is the probability he sells less than 2 cars? Write answer using three decimal places

43. ## Math

A manufacturing machine has a 9% defect rate. If 10 items are chosen at random, what is the probability that at least one will have a defect

44. ## Science

Create a scale for your model thermometer. Divide the distance between the two marks into 5-mm intervals. Starting with the lowest point, label the intervals on the straw 0, 1, 2, 3, and so on. Describe your scale below. So I don't understand this part:

45. ## algebra 2

if the equation for the regression line for the data set (3,6), (6,2), (9,10) is y=2/3x+2, what is the sse for the data set? A. 16 B. 10 C. 4 D. 24

46. ## algebra 2

Danielle needs to walk 2.5 miles. If she wants to reach her destination in 30 minutes ( hour), how fast does she need to walk?

47. ## literature/ GUM

Which word is the antecedent of the underlined pronoun? The boy took his time filling out the form and then checked it for spelling errors. A. form B. boy C. errors D. time

48. ## chemistry

What mass of oxygen is needed for the complete combustion of 5.00×10−3g of methane?

49. ## physics

The figure shows an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 82.6 N on the wall to which it is attached. The tensions in the shorter cords are T1 =

50. ## physics

In 1939 or 1940, Emanuel Zacchini took his human-cannonball act to an extreme: After being shot from a cannon, he soared over three Ferris wheels and into a net (see the figure). Assume that he is launched with a speed of 28 m/s and at an angle of 56°.

51. ## physics

To test the quality of a tennis ball, you drop it onto the floor from a height of 4.31 m. It rebounds to a height of 2.51 m. If the ball is in contact with the floor for 12.6 ms, what is its average acceleration during that contact?

52. ## physics

You are to make four straight-line moves over a flat desert floor, starting at the origin of an xy coordinate system and ending at the xy coordinates (-148 m, 66 m). The x component and y component of your moves are the following, respectively, in meters:

53. ## physics

A rock is dropped from a 196-m-high cliff. How long does it take to fall (a) the first 98.0 m and (b) the second 98.0 m?

54. ## physics

A stone is dropped into a river from a bridge 45.4 m above the water. Another stone is thrown vertically down 1.14 s after the first is dropped. Both stones strike the water at the same time. What is the initial speed of the second stone?

55. ## CHEMISRTY

How many liters of H2O will form when excess O2 reacts with 100 liters of H2 according to the gas phase reaction:

56. ## Algebra

The graph of y=x^2-3x+6 has how many intercepts? (the term x^2 means x squared)

57. ## math

Identify the initial value and growth or decay factor in each of the following exponential functions: a) y= 350 x 5^x b) Q= 25000 x (1/2)^t c) P=(7 x 10^3) x 4^t d) N= 5000 x (9/10)^t

58. ## Hamlet...essay - Writeteacher

Kristy Cheung Ms.Weately Grade 11 U English January 10, 2013 Title A person who sets off another person by being a contrast to that person is known as a foil to the character. In Shakespeare’s great tragedy Hamlet, two character Laertes and Fortinbras,

59. ## English....Writeacher checkthis out!

I DID IT!:) The Tainted Mirror In Shakespeare’s great tragedy Hamlet, three characters Hamlet, Laertes and Fortinbras, develop as “foils,” or contrasting characters. Several comparisons and contrasts can be shown between the three characters, many of

60. ## physical science

To what Celsius temperature must a gas sample initially at 20 degrees Celsius be heated if its volume is to double while the pressure remains the same?

61. ## teacher aide

Need help! If you're preparing a bulletin board, how many ideas should you try to get across at one time? A One B Two C Four D As many as possible I think A one, but I can't seem to find it anywhere. Can someone plz help.

62. ## Chemistry

How many pi bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

63. ## Chemistry

How many pi bonds and sigma bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

64. ## Chemistry

How many pi bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

65. ## Chemistry

How many pi bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

66. ## Chemistry

How many pi bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

67. ## Chemistry

How many pi bonds and sigma bonds are in ritalin molecule? I counted 4 pi bonds and 18 sigma bonds is that correct? I know double bonds are pi bonds and single bonds are pi bonds

68. ## college physics

An ideal gas (volume 1.1m3, pressure 103600 Pa, temperature 400 K) undergoes an isothermal process during which it absorbs 2000 J of heat. How much did the entropy of the system increase?

The state legislature where Brighton was governor passed a statute giving him the power to nullify the Bill of Rights of the U.S. Constitution. Brighton exercised this power by eliminating the First Amendment. He then shut down all state newspapers that

70. ## Math

What is the unit rate? A racing car travels 180 miles in 1.5 hours. 5 i need it as a fraction like: 180mi/1.5 hrs thats not the unit rate i think it is The units here will be miles per hour. (Another valid yet rare answer is hours per mile.)

71. ## English

what is the total number of verb types?

72. ## stats

the television show Law & Disorder has been successful for many years. That show recently had a share of 20, which means, that among the TV sets in use, 20% were tuned to Law & Disorder. An advertiser wants to verify that 20% share value by conducting its

73. ## math

the television show Law & Disorder has been successful for many years. That show recently had a share of 20, which means, that among the TV sets in use, 20% were tuned to Law & Disorder. An advertiser wants to verify that 20% share value by conducting its

74. ## math

If a 54 pound boy falls off the top of the grand canyon which is 5996 feet deep, how many seconds will it take for him to hit the bottom?

75. ## physical science B

I have to build a roller coaster with 3 hills. Hill A is 15 inches high,it drops down to 3 inches, rises to 8 inches, drops again to 5 inches and rises a last time to 3 inches before dropping off. My question is when using a tennis ball as the car.. 1.

76. ## algebra

A truck leaves a depot at 11 A.M. and travels at a speed of 54 mph. At noon, a van leaves the same place and travels the same route at a speed of 64 mph. At what time does the van overtake the truck?

77. ## Math

A truck is carrying orange juice cherry juice and cranberry juice bottles in a ratio of 1:2:5. If there are 30 cherry juice bottles, then how many cranberry juice bottles are there?

78. ## college chemistry

We did not find any results for 'An automobile gasoline tank holds 23.0 gal when full. How manypounds of gasoline willit hold if the gasoline has a density of 0.737 g/ml?

79. ## Physics

A(n) 160 g block is pushed by an external force against a spring with spring constant of 1260 N/m until the spring is compressed by 11.8 cm from its uncompressed length. The compressed spring and block rests at the bottom of an incline of angle θ =

80. ## physics

A skateboard with mass M rolls down a ramp, starting from rest. It takes time T to roll a distance L along the ramp. In terms of M, T, and L, what is the skateboard’s acceleration down the ramp?

81. ## Chemistry

The values on the label of a bottle of nitric acid are specific gravity 1.42 and assay 60%. Use these values to determine the molarity of the solution. Show your work.

82. ## physics

Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, with rotational inertia 1.46 kg·m2 about its central axis, is set spinning

83. ## physics

In Figure (1), a 3.50 g bullet is fired horizontally at two blocks at rest on a frictionless table. The bullet passes through block 1 (mass 1.13 kg) and embeds itself in block 2 (mass 1.75 kg). The blocks end up with speeds v1 = 0.600 m/s and v2 = 1.32 m/s

84. ## physics

In the figure, block 1 of mass m1 slides from rest along a frictionless ramp from height h = 2.8 m and then collides with stationary block 2, which has mass m2 = 2m1. After the collision, block 2 slides into a region where the coefficient of kinetic

85. ## physics

A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. At one time it is rotating at 7.8 rad/s; 60 radians later, its angular speed is 19 rad/s. Calculate (a) the angular acceleration (rad/s2), (b) the

86. ## physics

Three astronauts, propelled by jet backpacks, push and guide a 131 kg asteroid toward a processing dock, exerting the forces shown in the figure, with F1 = 36 N, F2 = 58 N, F3 = 41 N, θ1 = 30°, and θ3 = 60°. What is the (a) magnitude and (b) angle

87. ## physics

A baseball leaves a pitcher's hand horizontally at a speed of 115 km/h. The distance to the batter is 18.3 m. (Ignore the effect of air resistance.) (a) How long does the ball take to travel the first half of that distance? (b) The second half? (c) How far

88. ## physics

A rifle that shoots bullets at 404 m/s is to be aimed at a target 49.7 m away. If the center of the target is level with the rifle, how high (in cm) above the target must the rifle barrel be pointed so that the bullet hits dead center?

89. ## physics

A lead ball is dropped in a lake from a diving board 5.89 m above the water. It hits the water with a certain velocity and then sinks to the bottom with the same constant velocity. It reaches the bottom 4.29 s after it is dropped. (a) How deep is the lake?

90. ## physics

A startled armadillo leaps upward, rising 0.521 m in the first 0.204 s. (a) What is its initial speed as it leaves the ground? (b) What is its speed at the height of 0.521 m? (c) How much higher does it go

91. ## physics

To test the quality of a tennis ball, you drop it onto the floor from a height of 4.31 m. It rebounds to a height of 2.51 m. If the ball is in contact with the floor for 12.6 ms, what is its average acceleration during that contact?

92. ## PHYSICS

A lead ball is dropped in a lake from a diving board 5.89 m above the water. It hits the water with a certain velocity and then sinks to the bottom with the same constant velocity. It reaches the bottom 4.29 s after it is dropped. (a) How deep is the lake?

93. ## physics

A startled armadillo leaps upward, rising 0.521 m in the first 0.204 s. (a) What is its initial speed as it leaves the ground? (b) What is its speed at the height of 0.521 m? (c) How much higher does it go?

94. ## physics

A stone is dropped into a river from a bridge 45.4 m above the water. Another stone is thrown vertically down 1.14 s after the first is dropped. Both stones strike the water at the same time. What is the initial speed of the second stone?

95. ## Music

How was rock a revolutionary and democratic music?

96. ## Music

How did music in the sixties represent/reflect the political and social climate? 3 ways.

97. ## Science

Describe the geomorphic processes that shape the Earth’s surface. Use the Yosemite Valley to explain one or more of those processes.

98. ## Math

Tom has some baseball cards and football cards. He had four times as many football cards than baseball cards. He has 12 football cards. How many baseball cards does Tom have?

99. ## physics angular velocity

A 20g steel weight is placed on the edge of 1 30cm diameter plastic disk. The coefficient of static friction between the steel weight and plastic disk is 0.4. At what angular velocity will the weight slide off the disk?