# Math/Physics

214,834 results, page 42

1. ### physics

find the magnitude and direction of a combination of 48N east and 14N north.
2. ### physics

A long jumper jumps with the initial velocity of 12.0 m/s at an angle of 20 degrees. what is the displacement of x?
3. ### physics

Under what conditions will the projectile have the greatest velocity when it hits the ground?
4. ### Physics

How much work is required to stop an electron (m = 9.11*10^-31 kg) which is moving with a speed of 1.50×106 m/s?
5. ### physics

A constant 6.0N net force acts for 4.0 s on a 12 kg object. what is the objects change of velocity
6. ### Physics Help!!!

With the energy needed to warm up some amount of water from 26°C to 44°C, how high could you lift it?
7. ### physics

a free body diagram of a boy sliding down a hill on a sled
8. ### Physics

Please help! How long would it take (in seconds) to travel 1 km at a speed of 100 km/h?
9. ### physics

a 27,000kb freight train starting at 12m/s then speeds up to 45 m/s in 35 seconds. what is the acceleration?
10. ### Physics

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

if a 700-kg piano us lifted 4.0 meters in 14 seconds, how much power is developed
12. ### physics

if a 700-kg piano us lifted 4.0 meters in 14 seconds, how much power is developed
13. ### Physics

Question contains pictures: h t t p : / / g o o . g l / M H k y 1 (delete the spaces between the characters for the URL)
14. ### physics

What is the acceleration of a 23 kg pail of cement that is pulled upward (not sideways!) with a force of 300 N?
15. ### physics

How much work must be done to stop a 1040 kg car traveling at 111 km/h?
16. ### Physics

A bicycle with tires .064 m in diameter travels 8.1 km. 1. How many revolutions do the wheels make?
17. ### physics

A pendulum is 1.0 m long and is drawn aside 30.0* and let go. Find the velocity at the lowest point.
18. ### Physics

Write each number in scientific notation: 1) 15.01 ans. Is it 15.01 x 10 minus to the power of 2?? Am i wrong?
19. ### physics

An RC car has a power rating of 12 W and a mass of 1.0 kg. How long would it take to reach 5 m/s ? thanks.
20. ### Physics

Calculate the hang time of an athlete who jumps a vertical distance of 0.75 meter.
21. ### physics

An object accelerates uniformly from rest at a rate of 2 m/s2 for 3 s and then 5 m/s2 for 15 s. Find its final velocity?
22. ### physics

What force is needed to accelerate a child on a sled with the total mass of 43kg at 1.5m/s
23. ### physics

What would be the resulting acceleration if a 7.0 kg shot put was launched with a force of 140 N?
24. ### physics

If you throw a cigarette out a car window that is moving at 10 mph where will it land
25. ### physics

If you throw a cigarette out a car window that is moving at 10 mph where will it land
26. ### Physics

An automobile driver puts on the brakes and decelerates from 30.0 m/s to 0 in 10.0 s. What distance does the car travel?
27. ### physics

two identical objects move with speeds of 5.0 m s and 25.0 m s. What is the ratio of their kinetic energies?
28. ### physics

what happens to the force of frictionif the coefficient of friction was reduced by one thrid
29. ### Physics

What is the volume of 3.25 moles of a gas at a temperature of 115 K and a pressure of 275 kPa?
30. ### Physics

During the pre-industrial era, what were the Carbon Dioxide levels like?
31. ### Physics

What is the amount of CO2 added to the earth's atmosphere each year from fossil fuels?
32. ### physics

Why does a 10 gram bullet have more momentum traveling at 200m/s than at 20m/s?
33. ### physics

the rate at which position changes with time is called acceleration. true or false?
34. ### physics

the rate at which position changes with time is called acceleration. true or false?
35. ### physics

the rate at which position changes with time is called acceleration. true or false?
36. ### Physics

The period of revolution of a satellite is 90min. What is the altitude above the surface of the earth?
37. ### PHYSICS

what are the components of a vector that has a magnitude of 1.5 m at the angle of 35 degrees with respect to the positive x axis
38. ### Physics

How do I find tangential speed with just radius, time and angular acceleration?
39. ### physics

A 55 kg swimmer crosses a 100 m pool in 12 s. If she moves with a constant velocity, what is her momentum?
40. ### Physics

How much time is needed for 5.0 N force to increase the speed of a 0.248 kg object from 12 m/s to 56 m/s?
41. ### Physics

1.What is the acceleration of a projectile when instantaneous vertical velocity is zero at the top of its trajectory?
42. ### physics

density= mass/volume=150kg/(30*20*500) in kg/cm^3 what is kg/cm^3 and can you explain how to use this please
43. ### physics

Two point charges, +3.63 µC and -5.95 µC, are separated by 1.18 m. What is the electric potential midway between them?
44. ### physics

Two point charges, +3.30 µC and -5.50 µC, are separated by 1.29 m. What is the electric potential midway between them?
45. ### PHYSICS

WHAT IS MAGNITUDE OF NORMAL FORCE IN FIGURE WITH V=+3M/S +10n INSIDE BOX IS 5KG
46. ### PHYSICS

WHAT IS MAGNITUDE OF NORMAL FORCE IN FIGURE WITH V=+3M/S +10n INSIDE BOX IS 5KG
47. ### PHYSICS

Can someone please explain friction. i don't even understand the concepts parts!
48. ### physics

how much energy was released by a 60 kg cannon shooting an 8 kg projectile horizontally at 50m/s?
49. ### physics

lava ball is shot straight up at 28m/s what is speed after 3 seconds
50. ### physics

If your car has a mass of 770 kg, how much force is required to accelerate it forward at 4.98 m/s2?
51. ### Physics

What is the average power output of a weightlifter who can lift 260 kg to a height of 1.9 m in 1.8 seconds?
52. ### physics

Calculate the net force needed to give an acceleration of 0,5m/s to a trolley with a mass of 1,5 kg
53. ### physics

If your car accelerates from rest at a steady rate of 4 m/s2, how soon will it reach 81 km/h (50.3 mph or 22.5 m/s)?
54. ### physics

What is the force of gravity between two spheres that have a mass of 6 kg and are separated by 36 m?
55. ### physics

What is the force of gravity between two spheres that have a mass of m1 =13 kg, m2 = 49 kg and are separated by 35 m?
56. ### physics

A ball is thrown vertically upward at 14.7 m/s. Show that its maximum height will be 11m.
57. ### PHYSICS

A 69.0 firefighter climbs a flight of stairs 22.0 high. How much work is required?
58. ### Physics

A 200N sign hangs and makes a 15.5 angle with the horizontal. What is the Tension in each rope?
59. ### Physics

Is it true that a drop of water can pass through a solid travelling by 1800m/s2?
60. ### Physics

Could a rubber band be used to replace the spring in a Hooke's Law experiment? Why/ why not?
61. ### Physics

how high does a stone rise if it is initially thrown at a rate of 15m/sec
62. ### Physics

How much work must be done to stop a 1250 kg car traveling at 105 km/h?
63. ### Physics

If an 80-kg sprinter can accelerate from a standing start to a speed of 10 m/s in 3 s, what average power is generated?
64. ### physics

calculate the speed of an 7.3*10^4kg airliner with a kinetic energy of 1.4*10^9J. answer in units of m/s.
65. ### physics

How much work is required to stop an electron (m = 9.11 10-31 kg) which is moving with a speed of 2 106 m/s?
66. ### physics

For S.H.M, a graph of acceleration against displacement gives a slope of 16 unit. The period is
67. ### Physics

Describe how surface area and volume are related in solids? Give an example.
68. ### Physics

Describe how you can determine the specific heat of an unknown metal whose mass is known.
69. ### physics

How much heat is absorbed by an electric refrigerator in charging 2 Kg of water at 15°C to ice at 0°C?
70. ### physics

Determine the resulting temperature when 150g of ice at 0°C is mixed with 300g of water at 50°C

A 12.1 g CD with a radius of 6.16 cm rotates with an angular speed of 31.1 rad/s. What is its kinetic energy?

A 12.1 g CD with a radius of 6.16 cm rotates with an angular speed of 31.1 rad/s. What is its kinetic energy?

A 12.1 g CD with a radius of 6.16 cm rotates with an angular speed of 31.1 rad/s. What is its kinetic energy?
74. ### physics

What happens to the gravitational energy of a firefighter when he slides down the fire poles?
75. ### AP Physics

A car slows down from 18 m/s to rest in a distance of 91 m. What was its acceleration, assumed constant?
76. ### physics

You are driving a car with a power output of 56,000 Watts. How many seconds will it take to go from 0 m/s to 27 m/s?
77. ### physics

The density of a solid ball with a mass of 231 g and a volume of 110 cm^3 is ____ g/cm^3.
78. ### Physics

if the frequency of a particular electromagnetic wave is 4 x 10^14 hertz, what is its wavelength of the radiation in nanometers (nm)?
79. ### Physics

What is a node? i'm supposed to label the nodes in a diagram of a wave but i can't find it anywhere
80. ### physics

the minute hand of a large clock is 2 m long. what is its mean angular speed?
81. ### Physics

If a +q charge is placed at d in the x-axis (x_0<d), what happens to the total electric field in 1?
82. ### physics

how much work is done by an engine using 105 watts of power in 3.2 seconds?
83. ### Physics

If a +q charge is placed at d in the x-axis (x_0<d), what happens to the total electric field in 1?
84. ### physics help!

The displacement of an object is given by y = (4.6 cm) sin 28ðt. (a) What is the amplitude? (b) What is the frequency? (c) What is the period?
85. ### physics

Find the electric field at the folowing radii from the center of this charge configuration.
86. ### physics

if V = (10x-10y)i + 30k find pressure change between points (0,0,0) and (3,1,0)
87. ### physics

What is the value of the gravitational acceleration at a height of 2000 km above the surface of the Earth?
88. ### physics

If a coffee can has a radius of 63.0 cm and a height of 15.8 cm find its volume round to neaerest cm3
89. ### physics

The third longest wavelength in the Paschen series in hydrogen corresponds to what transitions?
90. ### physics

In LCR series AC circuit when does the effective voltage lag behind the current?
91. ### physics

At what speed should an object be projected to reach the maximum range of 200 m ?
92. ### physics

what are the two forces that affect the motion of a child as she comes down a slide?
93. ### physics

What is the wavelength of the peak of the blackbody radiation curve for the human body (T = 310 K)?
94. ### Physics

How much energy is deposited in the body of a 78 kg adult exposed to a 2.9 Gy dose? Please and thank you.
95. ### Physics

What is the acceleration of a proton moving with a speed of 4.3 m/s at right angles to a magnetic field of 2.1 T?
96. ### physics ---- really dnt get this at all

Will the photoelectric effect change for different targets
97. ### physics

How will the current in a wire change as the wavelength of light changes? I have no idea how to do this.
98. ### physics

How will the current in a wire change as the wavelength of light changes? I have no idea how to do this.
99. ### physics

find the maximum voltage that can be applied to a 8 kohm resistor rated 0.50 Watt?
100. ### physics

find the maximum voltage that can be appliedto a 8 k ohm resistor rated 0.50 watt?