# Math/Physics

215,206 results, page 50

1. ### physics

how long will it take for an apple falling from a 29.4m tall tree to hit the ground? how
2. ### Note for Ms. Sue

Check out the Physics posting on the top of the list. Can it be deleted?
3. ### physics

If a hair dryer is rated at 900 W, how much energy does it require in 5 minutes?
4. ### Physics

What equation gives the velocity as a function of time for an object with constant acceleration?
5. ### Physics

In the photoelectric effect, what happens to the stopping voltage when the light frequency is decreased?
6. ### Physics

Show that the x-component of the tension force Fc in terms of its magnitude Fc is given by -0.3420 Fc
7. ### Physics

A bottle cork floating on water has a mass of 50g what is its weight?
8. ### Physics!

A 40 kg girl runs up a flight of stairs that is 34 m high. How much work does this require?
9. ### physics

What is the momentum of an automobile (weight = 9800 N) when it is moving at 36 m/s to the south? magnitude
10. ### Physics! NEED HELP!

A 40 kg girl runs up a flight of stairs that is 34 m high. How much work does this require?
11. ### PHYSICS

At what angle should you launch a projectile from the ground so that it has the greatest time of flight?
12. ### Physics

Is getting shot considered to be an elastic or inelastic collision if blood shoots out everywhere?
13. ### physics

You throw a ball straight up at 25 m/s. How many seconds elapse before it is traveling downward at 13 m/s? 1 s
14. ### physics

A 2.7 kg object falls from a tower. It experiences 2.3 N of air resistance. What is the acceleration?
15. ### Physics

how does the slope of a Ff-Fg graph relate to the coefficients of friction , prove it mathematically.
16. ### physics

what is the work done in moving a positive charge 12UC across two points 6cm apart
17. ### Physics

The acceleration of a certain rocket is given by ax=bt where b is positive constant, find the position and velocity at t=5.0s if Xo=0 and Vo=0 and b=3.0m/s^3?
18. ### physics

find the no. of electron which must be removed from a conductor so that it requires a charge of 3.2 microC
19. ### physics

At the end of a race a runner decelerates from a velocity of 7.00 m/s at a rate of 0.300 m/s2.
20. ### physics

if you exert a force of 500N to walk 4M up a flight of stairs in 4S , how much power do you use?
21. ### physics

How does changong the tension of a string change the pitch? It shortens the ocilation
22. ### Physics

If you are viewing a hologram and you close one eye, will you still perceive depth? Explain.
23. ### physics

what happens to acceleration due to gravity if you climb the tallest mountains on the earth ?
24. ### physics

The acceleration of a certain rocket is given by a=bt where b is positive cnstant, find the position function Xo and Vo at t=o?
25. ### physics

What equation gives the position as a function of time for an object with constant acceleration?
26. ### Physics

Explain how you would determine how much error there is between a vector addition and the real results.
27. ### Physics

For a pendulum that completes fifteen complete swings in 34.8 seconds, how much is the frequency?
28. ### Physics

what 2 properties of carbon make it a good material to use for motor brushes?
29. ### Physics

When hitting a golf ball, does the force of gravity increase or decrease??
30. ### physics

a 1500 kg car accelerates from 0 to 25 m/s in 7.0 s. What is the average power delivered to the engine?
31. ### physics

What would the gravitational potential energy be if the bucket were raised six times as high?
32. ### physics

A strong lightning bolt transfers about 26 C to Earth. How many electrons are transferred?
33. ### Gr 9 Science - physics

If all 3 resistors in a series 12V circuit are the same, what will the voltage be across resistor no. 3?
34. ### Physics

An adventurous aardvark arduously ambles from (3.0, 2.0) m to (−4.0, −2.0) m. What is the displacement in polar coordinates?
35. ### physics

Which has the greater acceleration, a car that increases its speed from 50 to 62 km/h, or a bike that goes from 0 to 12 km/h in the same time?
36. ### Physics

The 2010 Mustang GT accelerates from 0 to 60 mph in 5.2 seconds. What is the acceleration rate? in m/s/s?
37. ### physics repost

Calculate the force of gravatational attraction between two spheres of mass 10.1 kg and 45.4 kg that are 38.5 m apart. F = G(m1)(m2)/r^2 = 6.67 x 10^-11(10.1)(45.4)/38.5^2 = 2.06 x 10 ^-11 N
38. ### physics

A tank of 10m height is filled half what will be pressure at bottom
39. ### Physics

1) Please describe the typical path(s) for hurricanes. Is this part of the pattern of convection?
40. ### Physics

If you combine 34 kg of ice at 0°C with 80 kg of steam at 100°C, what is the final temperature of the system? °C
41. ### Physics

A ball rolls off the edge of a balcony at 8.0 m/s. Find its speed after 3.8 s in the air. Use g = 10. m/s2
42. ### physics

A rock is dropped from a 154-m-high cliff. How long does it take to fall (a) the first 77.0 m and (b) the second 77.0 m?
43. ### physics

If a car has a mass of 400 kg and a velocity of 30 m/s to the east, what is the magnitude of its momentum?
44. ### physics

what is your age in seconds? this is a conversion problem. someone help please with all the multiplication and division... very confused. THANK YOU
45. ### Physics

C:\Users\Kristi\Pictures\Screenshots\Screenshot (691).png
46. ### Physics

A 70 kg woman pushes on a wall at 35 newtons and recoils. What is the magnitude of the force?
47. ### Physics

Find the centripetal acceleration of a car that rounds an 80 m radius curve at 10 m/s.
48. ### physics

explain why air moving over an object can increase its rate of cooling.
49. ### Physics

Calculate the volume of a spherical balloon which has a surface area of 0.0793 m2
50. ### physics

What is the maximum walking speed of an adult man whose legs are each 0.90 m long?
51. ### physics

You throw a ball straight up at 25 m/s. How many seconds elapse before it is traveling downward at 13 m/s?
52. ### Health Physics

As the shape of the diaphragm is changed dueing respiration, what does it possess?
53. ### Physics

2. How many oxygen atoms are indicated on the right side of this balanced chemical equation? 4 Cr(s) + 3 O2( g)h2 Cr2O3( g)
54. ### physics

If the kinetic energy of an automobile triples because of a speed change, it momentum is ?
55. ### College Physics

What is the momentum of an automobile (weight = 9700 N) when it is moving at 36 m/s to the south?
56. ### physics

A soccer ball has a diameter of about 22 cm and a mass of about 430 g. What is its terminal velocity?
57. ### physics

If the same shoe were dropped from a height of 40m, how many seconds would it take it to hit the floor?
58. ### Physics

When striking, the pike, a predatory fish, can accelerate from rest to a speed of 3.6 m/s in 0.11 s .
59. ### physics

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

What force is needed to accelerate a child on a sled (total mass = 60 kg) at 1.25 m/s2?
61. ### physics

a 8.0 kg object undergoes an acceleration of 2.2 m/s squared.what is the resulting force acting on it?
62. ### Physics

What weight of water is required to fill a 80 gallon aquarium? The answer must be in kN
63. ### physics

How much force does an 60 kg astronaut exert on his chair while accelerating straight up at 8m/s squared?
64. ### physics

A storage tank of negligible mass and 30 m high is filled with gasoline
65. ### physics

0.24 h to reach the school from your house. velocity of the bus is 19.7 km/h to the east, what is the displacement?
66. ### physics

how do you find the verticle component of velocity of a projectile just as it strikes the ground?
67. ### Physics

show that the oscillation of a liquid in a u-tube is in simple harmonic motion.
68. ### Physics

What is the velocity of an object that is dropped from a height of 20m,just before it reaches the ground?
69. ### physics

lenses that always diverge light rays that strike them is that convex or concave? I am not sure.
70. ### physics

A body of mass 20kg dropped from a height of 2m calculate the workdone?
71. ### Physics

What is the color of all the visible light frequencies mixed together equally? I would think white. Is that right?
72. ### Physics

A potter's wheel rotates with an angular frequency of 1.54 rad/s. What is its period?
73. ### physics

a spring has a force constant of 20000 N/m how far must it be strectched for its potential energy to be 43 J??
74. ### physics

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

A dart is thrown horizontally toward X at 30 m/s as shown. It hits Y 0.29 s later. The distance XY in centimeters is:
76. ### physics 102

What are the wavelengths of electromagnetic wave in free space that have the following frequencies? (a) 3.00 10^19 Hz pm (b) 7.50 10^9 Hz cm
77. ### physics

if you jump upward with a speed of 2mls, how long will it take before you stop rising?
78. ### Physics

Which of the following is the correct relationship between the electric field strength and the potential difference?
79. ### physics

How does pressure work as a restoring force to create a sound wave?
80. ### physics

A car covers a distance of x,while moving at 54km/1 in 15sec.Find the value of x
81. ### Physics

A jeep has a speed of 50 m/s at a given instant and 10 m/s later. fin its retardation, assuming it to be constant.
82. ### physics

What is the electric field intensity of a point 15cm from a charge 15microcoulomb
83. ### physics

A car accelerates from rest at 2.57 m/s2. What is the velocity at the end of 5.4 s? Answer in units of m/s
84. ### physics

determine the magnitude of the centripetal force that acted on the whirling ball??
85. ### physics

An 80 kg skateboarder going 10 m / s is launched nearly vertically off a ramp as shown. Approximately how high does he go?
86. ### physics

what is your final velocity after 680 meters if you start out at 90km/hr and acceleration is 9 m/s
87. ### physics

if it costs 4.5 to 7.5 cents per kilowatt-hour (wind energy) what is the price per kW?
88. ### physics

A ball is thrown up with a speed of 30m/s, what is the maximum height reached?
89. ### Physics

Describe Robert Millikan's experiment and what significant info he learned?
90. ### Derivation of Physics Equation

How do we derive these laws: (most of the time, the numbers are subscript) v'2 = v1 * ( (2 * m) / (m1 + m2) ) + v2 * ( (m2-m1) / (m1+m2) ) & v'1 = v1 * ( (m1-m2) / (m1+m2) ) + v2 * ( (2 * m2) / (m1 + m2) )
91. ### Physics

How do you calculate the energy needed to heat 4 kg of water from 25oC to 45oC?
92. ### physics

How much force does an 60 kg astronaut exert on his chair while accelerating straight up at 8m/s squared?
93. ### Physics

If a car increases its speed from 5 m/s to 25 m/s over 40 seconds. what is the acceleration? Give the unit.
94. ### Physics

Find the length of a bridge if it is known that the steel in the roadbed expands by 0.52 m when the temperature changes from +2 to +30°C.
95. ### physics

If you run away from a plane mirror at 2.35m/s , at what speed does your image move away from you?
96. ### Physics

Find the speed of sound (in m/s) at -35°C at 1 atm pressure in dry air.
97. ### physics

which of acceleration age speed temperature and velocity are vector quantities
98. ### physics

Explain how the pitch of the roaring sound relates to the length of the tube.
99. ### physics

Why is it vital that there is friction thatb opposes motion when two surfaces try to slide across one another?
100. ### Science-Physics

From what height was a brick dropped if it hit the ground with a speed of 4.3 m/s?