# Physics!

74,730 results, page 58
1. ## Physics

Calculate the work done by a 300N Force moving a 20kg object a distance of 50m
2. ## Physics

Find the pressure exerted by a waterbed with dimensions of 2m x 2m which is 30 cm thick. (hint:use density of water)
3. ## physics

a cricket ball is takes 3 sec to reach the maximum height its initial velocity is???
4. ## Physics

What is the maximum total force exerted on a 78 kg astronaut by her seat during the launch of the Space Shuttle?
5. ## physics

What upward tension force (in Newtons) would allow a 1240-kg elevator to accelerate downwards (i.e., negative) at a rate of 4.29 m/s/s?
6. ## physics

A car traveling at 60km/h. It then accelerates at 3.6m/s^2.How long does it take to reach a new speed. How far does it travel during acceleration.
7. ## physics

What is the magnitude of F? Assume the acceleration due to gravity is 9.8 m/s 2 and the surface is frictionless. Answer in units of N.
8. ## Physics

What is the de Broglie wavelength of an electron that strikes the back of the face of a TV screen at 1/9 the speed of light?
9. ## physics

A crate is given an initial speed of 5.0m/s up the 22.5∘ plane shown in (Figure 1) . Assume μk = 0.12.
10. ## physics

state the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS 6. +0.50 DS c. +1.75 DS
11. ## Physics

torque to move a block of m=200kg for 10m at an angle of 25 degree with a speed of 20m/s.
12. ## science(physics)

a force f= 3i+cj+2k acting on a particle causes displacement , d=-4i+2j+3k. If the work done is 6 joule then the value of c. Plz. Solve
13. ## Physics

Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet.
14. ## Physics

how much work is needed to raise a 6.0 Kg object14.0 m at constant speed?assume that friction is negligible.
15. ## physics

An airplane lands and starts down the runway at a southwest velocity of 41 m/s. What constant acceleration allows it to come to a stop in 1.3 km?
16. ## Integrated Physics and Chemistry

What are a few of the positive things the Equal Rights Amendment would have done for women in America?
17. ## Physics

If the Kitty Hawk Flyer has 12 HP how would you express this power in the SI system and report the numerical value in kilowatts?
18. ## physics

A plane cruising at 251 m/s accelerates at25 m/s2 for 9 s.What is its final velocity?Answer in units of m/s
19. ## physics

if the gravitational constant, increased to a billion times its actual value, what sorts of things would happen?
20. ## physics

How do we compensate for thermal expansion /contraction in the construction of metal pipes for carrying steam?
21. ## physics

a car is moving at 17.7 m/s when it begins to slow down with a deceleration of 2.5 m/s2. how long does it take to travel 20 meters as it slows down
22. ## PHYSICS

without air resistance maximum range of projectile is obtained with an angle of ???? Can you please fill in the blank THANK YOU
23. ## physics URGENT

3. Using conceptual meaning of g = Fg/m [N/kg], answer the following: a) What does the spring scale read on the surface of the Moon?
24. ## Physics

What is the work required for a 1000kg truck to increase in speed from 30 m/s to 40m/s? Is the answer 350 kJ?
25. ## physics

what maximum height will a 311.2 m drive reach if it is launched at an angle of 17.0 degrees to the ground
26. ## college physics

an automobile traveling at 25.0 km/h along straight,level road accelerates to 65.0 km/h in 6.00s what is the acceleration
27. ## physics

If a car travels westward with a constant velocity of 20 m/s, what is the net external force acting on it?
28. ## physics

Determine the net force needed to cause a 1310kg sports car to accelerate from 0 - 28.6m/s[fwd] in 5.6 s
29. ## Physics

What is the potential energy, in joules, of a spring with a force constant of 6 N/m when it is stretched 20 cm from its unstretched length
30. ## physics

A ball is thrown vertically upward with a velocity of 100m/s.It will reach the ground after hw many sec?
31. ## Physics

Assume the distance axis is linear and da = 10.0m and db = 35.0 m. Estimate the work done by a force F in moving a 2.80 kg object from da to db.
32. ## physics

A flashlight that is powered by 12 Volts and uses a bulb with a resistance of 90 Omega will have a current _________________ Amps.
33. ## physics

a racing car has a uniform acceleration of 4ms-2. what distances will it cover in 10s after start?
34. ## Physics

From the position vs time graph of an object moving with constant acceleration, how could you find the velocity
35. ## physics

on a cool night with no wind people facing a campfire feel a breeze on their backs. why?
36. ## mathematical physics

Using Green's Theorem evaluate the integral ∮c(xydx + x^2y^2 dy) where C is the triangle with vertices (0 ,0), (1, 0) and (1, 2).
37. ## Physics

Express the angular velocity of 36 rpm (revolutions per minute) in units of radians per second (rad/s).
38. ## Physics

a child twirls a yo-yo about in a horizontal circle. The yo-yo has a mass of 0.20 kg and is attached to a string 0.8 m long. what is the velocity of the yo-yo? thanks!
39. ## physics

State the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS b. +0.50 DS c. +1.75 DS
40. ## PHYSICS

Calculate for Bohr's atomic model the speed of the orbiting electron in the n = 7 state. (Answer in m/s)
41. ## Physics

How much force is needed to hold a nearly weightless but rigid 1-L carton beneath the surface of water?
42. ## physics

A projectile is fired with an initial speed of 26.0 m/s at an angle of 30.0 above the horizontal. the object hits the ground 9.00 s later
43. ## Physics

you throw a ball upwards in the air at a velocity of 80m/s how fast will it be moving at 3 sec?
44. ## physics

State the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS b. +0.50 DS c. +1.75 DS
45. ## physics

Describe how the energy from a rotating flywheel can be transferred to moving parts of a child's toy.
46. ## Physics

A 27.59 kg child is on a swing that hangs from 2.26-m-long chains. What is her maximum speed if she swings out a 48° angle?
47. ## physics

a car traveling at 7.0 m/s accelerates uniformly at 2.5 m/s TO REACH A SPEED OF 12.0 M/S HOW LONG DOES IT TAKE FOR THIS ACCELERATION TO OCCUR?
48. ## physics

what is the shortest possible time in which a bacterium could travel a distanceof 8.4 cm across a petri dish at a constant speed of 3.5 mm/s
49. ## Physics

Why is an ice cube at 0°C more effective in cooling soft drink than the same mass of water at0°C?
50. ## physics

If a race car completes a 4mi oval track in 73.2s, what is the average speed in units of mi/h?
51. ## physics

If an engine produces a (mass flow rate) of 100kg/s of thrust, what is the force in Newtons?
52. ## science-physics

What is the formula to calculate the speed of the electron the has a mass of 0.910000000000000000000000000000 kg and a radius of 0.5290000000000 m?
53. ## Physics

Where does it takes less time to boil eggs: in a pan of boiling water or in a pressure cooker?
54. ## physics

A bus is moving at a speed of 20m/s beyond to slow at a constant rate of 3m/s each second find how far it goes before stopping
55. ## physics

Determine the cubical expansion of a liquid of volume 20liters at 30Â°c and 20.35 liters at 100Â°c
56. ## physics

Doubling the frequency of a wave source doubles the speed of the waves. ( True or False)
57. ## physics

A 1.56kg seagull dives through the air and gains 4495 of energy.What is the birds speed?
58. ## physics

the period of revolution of a satellite is 90 min. Find the radius of the orbit assuming an acceleration of 9.8 m/s/s.
59. ## physics: relativity

I think I can rearrange the Lorentz contraction equation, solving for v using: v=sqrt[1-(L/Lo)^2] x c^2 Would someone check my thinking please? Thanks
60. ## physics

How can you easily increase the magnetic field strength inside a current-carrying coil?
61. ## Physics

An object 6.70 cm high is placed 15.1 cm in front of a convex mirror with radius of curvature of 8.55 cm. Where is the image formed?
62. ## physics

how high a building can superman jump over if he is to leave the ground with a velocity of 60 m/s at an angle of 75 degrees
63. ## Another physics question...

Deduce the electric field strenght at a point midway between charges of 7.2*10^-6 C and -3.4*10^-6 C that are 2.0m apart from air. Thank you!
64. ## physics

A 1.00 x 10^3 kg sports car accelerates from rest to 25.0 m/s in 7.50 s. What is the average power output of the automobile engine?
65. ## Physics

2.A 4430 kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the propellers?
66. ## physics

compute the least acceleration with which a man of mass 75 kg can slide down a rope which can sustain a weight of 580 N
67. ## physics

Write the equation for fill factor in terms of V_max, V_oc, J_max, and J_sc. FF =
68. ## Physics

Initial velocity is 21 m/s, the angle is 40 degrees, 20 meters away from the wall. How long is the ball in the air for?
69. ## physics

a baseball is thrown horizontally at a velocity of 35 m/s from a height of 1.5 m. How long does it take to hit the ground? how far does it travel?
70. ## physics

A liquid expands on heating. Explain briefly how its density will change with rise in temperature
71. ## Physics

Calculate the skid-to-stop of a car travelling oa a road at 100km/h with a coefficient of friction of 0.68.
72. ## Physics

A cricket jumps vertically upwards, and remains in the air for 1.6 s. At what speed did it leave the ground?
73. ## physics

How will the weight of a 20kg object change if it was in a lift that accelerates downward at 4 meters per second squared?
74. ## physics

Calculate the extension that would be produced by a 20N force if 15N extends a spring by 3cm
75. ## physics

A particle is projected from ground in a vetical direction at t=0 sec. at t=0.8 s, it reaches h=14m .It will again come to the same height at ?
76. ## physics

A spring has k = 88 N/m. Use a graph to determine the work needed to stretch it from x = 3.6 cm to x = 5.6 cm, where x is the displacement from its unstretched length.
77. ## Physics

With what maximum speed can an unsecured passenger stay in their seat on a Ferris wheel that has a diameter of 12 m.
78. ## physics

a 10,000hg car rounds a curve of radius 1200ft at 50mph what is its centripetal acceleration?
79. ## Basic Physics

If a swimming pool has dimensions; 28.2 5m x 10.0m x 2.30m, when it is full of water, what is the force on the bottom ?
80. ## fristyear physics

two girls a and b weighting 40 and 30 kg both of them pull 14m held by them.they will meet when covers a distance of?
81. ## physics

A car travels in a straight line for 3.9 h at a constant speed of 63 km/h. What is its acceleration? Answer in units of m/s2
82. ## physics

Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where V1 = 5.0 10-3 m3 and V2 = 20.0 10-3 m3.
83. ## Physics

What is the maximum total force exerted on a 71 kg astronaut by her seat during the launch of the Space Shuttle?
84. ## physics

A liquid expands on heating. Explain briefly how its density will change with rise in temperature
85. ## Physics

If a bullet is shot at velocity of 400 m/s and hits a copper plate, how much heat will be produced?
86. ## Physics

A 200kg motorcycle is driving in a circular path at 1 rev per 5 seconds and the circle has r=12m
87. ## physics

A 1.5 volt battery will increase the potential energy of ________________ coulombs of charge by 0.18 joules.
88. ## physics

A ball is thrown vertically upward with a speed of 27.6 m/s. How high does it rise? Answer in units of m.
89. ## PHYSICS

A girl rows 10 km downstream in 2 h. Her return trip takes 4 h. How fast can she row in still water. in km/h?
90. ## physics

A radio station is broadcasting at 90.7 mhz. compute for its wavelength in angstrom and energy in kilojoules.
91. ## Physics

r vector=(340m, 39 degrees below positive x-axis) What is rx and ry? I have no idea how to do or approach this problem, anyone please help and explain how to do this? Thank you!
92. ## Physics

When light passes from one medium to another then which of the following parameters may change? Velocity, frequency, colour or wavelenght?
93. ## PHYSICS

A roller coaster travels 101 ft at an angle of 45.7 ◦ above the horizontal How far does it move vertically
94. ## Physics

Two protons, an infinite distance apart are brought together to a separation of 1 nm. What is the initial potential energy of the system?
95. ## Physics

A 3.0 cmm high object is placed 10 cm from a concave mirror whose radius of curvature is 10 cm. Where is the image located?
96. ## Intro to Physics

With scanning probe microscopy technology, we see not actual atoms but rather images of them. Explain.
97. ## physics.pls help

A 100g bird siis in its nest. what is the Fnet(net force) in this case?
98. ## Physics

Calculate the speed with which a swimmer enters water if she slides down a frictionless ramp that is 2.6 m high
99. ## AP Physics

What minimum speed does a 130 g puck need to make it to the top of a 3.8 m -long, 23 ∘ frictionless ramp?
100. ## KENDRIYA VIDYALAYA, PHYSICS

A PROJECTILE HAS SAME RANGE 'R' WHEN MAXIMUM HEIGHT ATTAINED BY IT IS EITHER 'H1' OR 'H2'.FIND THE RELATION BETWEEN,'R','H1','H2'.