# Physics!

74,459 results, page 59

1. ### 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?
2. ### physics

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

with what velocity must a ball be thrown in order to achieve the height of 50 ft.? and how long will it stay in the air?
4. ### Physics

Leroy, who has a mass of 72 kg, is skateboarding at 5.9 m/s when he smacks into a brick wall and comes to a dead stop in 0.2 s.
5. ### physics

What is the relationship between the coefficient of friction and the time that it takes the object to reach the bottom of the ramp?
6. ### physics

how much work is done by the upward force of your head on a 50 N rock that you carry horizontally across a 10 m room?
7. ### physics

A construction crane's cable lifts a 49.5-kg box upward with an acceleration of 1.30 m/s2. Find the tension in the rope. N
8. ### Physics

A volleyball is served at an angle of 35 degrees with an initial speed of 5 m/s. What is the maximum height reached by the ball?
9. ### Physics

A football is kicked at an angle of 40 degrees with an initial speed of 7 m/s. What is the horizontal distance traveled by the ball?
10. ### physics

What design aspects of the snowmobile make it particulary useful for travel over ice and snow?
11. ### physics

a force of 10N acts on an object and raises its speed from 0 to 5 m/s in 10s.calcuate the average power.
12. ### physics

In a uniform magnetic field, can an Amperian loop ever have a non-zero value
13. ### physics

A wheel has turned through 120 revs in 10 s after starting. find the angular acceleration.
14. ### physics

A solid of relative density 1.25 is found to weigh 12g in water find its weight in air
15. ### Physics

A dragster's top acceleration is 60m/s^2. If it accelerates for 3 seconds from the starting line, how fast will it be going?
16. ### physics

a body projected with velocity 30m/s an angle 30¡ã with horizontal maximum height attained by he object is.........?
17. ### physics

At 7.15 cents per kilowatt-hour, what does it cost to leave a 75.0W light burning 24.0 hours a day?
18. ### physics

A 25HP electric motor turning a 1800 RPM will produce how many foot pounds of torque?
19. ### Physics

1. A cannon ball M = 10.0kg with V = 2.4×102m/s is broken into 2 parts, if m1 = 6.4kg with angle 37° and m2 with 53°, what is the magnitude of v1 and v2?
20. ### PHYSICS

Tin melts at 232 under standard atmospheric pressure. Express this temperature in kelvin
21. ### physics

a cyclist moves around equilateral triangle6kn/h10km/h,12km/hfind average speed?
22. ### PHYSICS

Determine the resulting temperature when 1kg of ice at 0 Degree celcius is mixed with 9kg of water.
23. ### physics

A boy drops a mango from a tree it falls without rebound wat happens to its momentum
24. ### Physics

An arrow is shot horizontally with a speed of 20 m/s from the top of a tower 60 m high .The time to reach the ground will be???????
25. ### Physics

Steam of mass 11.0 g at 100°C is added to 126.7 g of ice at 0.00°C. Find the final temperature of the system.
26. ### physics

Mechanical energy is the difference between the kinetic and potential energies of an object. true or false?
27. ### physics

a person covers a distance of 31 km and displacement 3 kms and time 25.5 min calcuclate average velocity
28. ### Physics

What is the tension in a 1-meter string that is spinning a 0.5-kg rock in a horizontal circle 3 times per second?
29. ### physics

You have a mass of 60 kg and run up some stairs that are 5 m high in 6 seconds. How much power did you produce?
30. ### PHYSICS

'show that a 2.5m length of wire with cross section area 0f 1.0mm and resistance of 0.75ohms has a resistivity o f 3.0 ×10-7'
31. ### Physics

If a man weighs 900 N on the earth, what would he weigh on jupiter, where acceleration due to gravity is 25.9 m/s^2?
32. ### physics

damon,reiny,steve,ms sue.plz get a solution 2 my question please itz urgent!!!
33. ### physics

light from the sun travels 1.5x10km to reach the earth .how long does it journey take in minutes?
34. ### physics

A bicycl rider starts from rest and moves with uniform acceration of 1.5m\s^2 it is velocity reachs 7.5m\s of a distance .......
35. ### physics

A 2000-kg car starts from rest and gains a velocity of 20 m/s in 5 /0s. What force was applied on it? What formula/s will I use?!
36. ### Physics

From what height must water fall from a dam to strike the margine waves w/ a speed 30m/s.
37. ### PHYSICS

what is the central acceleration of an automobile driving at 40 kph on a circular tracks having radius of 30m?
38. ### PHYSICS

Calculate the centripetal force on a 2100 kg carrounding a curve of 175 m radius at a speed of 60 kph.
39. ### physics

Results for: In An Ideal Transformer, The Voltage And Current Are 220V,2A And Those In Secondry Are 2000V, IA. The Value Of I Is?
40. ### physics

How much heat is needed to convert 1.0kg ice at -5celsius to steam at 105 celsius?
41. ### physics-heat transfer-urgent pls

Calculate the energy absorbed when 8.5g of ice is melted at 0 Celsius. thank you
42. ### Physics

What are three different kinds of automatic switching devices? What are the conditions that cause the on/off action of the switch?
43. ### PHYSICS

compute for the density of a brake fluid used in a car which has a volume of 600cm^3 and a mass of 100 g?
44. ### physics

Suppose the horizontal sweep of an oscilloscope takes 80ms how many cycles of a 100 Hz wave will be shown?
45. ### Physics

A race car moving at 35 m/s is uniformly slowed to a stop in 50 s. Find 1) acceleration, and 2) stopping distance.
46. ### PHYSICS

What is the force of attraction between two masses 5kg and 8kg at a distance of 60cm apart.
47. ### physics

Power applied to a particle varies with time as P=(3t^2-2t+1)W. Find the change in kinetic energy between t=1s and 4s.
48. ### Physics

An object initially at rest experiences an acceleration of 9.8 m/s^2. How much time will it take to achieve a velocity of 58 m/s?
49. ### physics

a body travels from rest with acceleration 8ms find its velocity when it has covered a distance of 100m
50. ### AP Physics

What is the minimum work needed to push a 1025 kg car 290 m up a 17.5° incline with zero friction?
51. ### Physics

mike is skiing downhill at a 25 degree angle. if his weight is 350N assuming there is no friction what is his acceleration
52. ### PHYSICS

TWO FORCES F1 AND F2 ARE ACTING AT RIGHT ANGLE TO EACH OTHER FIND THE EXPRESSION FOR THE RESULTANT FORCE?
53. ### physics

a 4200 kg helicopter accelerate upward 3m/s^2. lift force is exerted by the air on the propellers?(g=10m/s^2)
54. ### Physics

How fast must a plane fly at a latitude of 41.9° so that the sun stands still relative to the passengers?
55. ### Physics

How many coulombs pass through a wire that carries a current of 3.2 A for 5.0 h? I=Q/t Q=It Q=3.2*5*60 Q=960 I am told this is not the correct answer.
56. ### Physics

What would be the average velocity of an object falling 1.25m from the rest, just as it strikes the ground?
57. ### physics

an object takes 0.35 seconds to hit the floor, what height did it fall from? is the way to calculate it h = gt^2 / 2 so would it be = h = .5 * 9.8 * 0.35^2
58. ### Physics

Wat direction will the Electric Field Lines be in a parallel plate capacitor containing a dielectric ?
59. ### physics

2)if a curved of radius 50m is banked at 30 degree will a car travelling at 60 km/hr along the curve will safe?
60. ### physics

A stone is projected vertically upward with a speed of 20 m/s. a. What is its velocity at the end of 2s? b. What is the height reacted after 2s?
61. ### Physics

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

How long it takes a car at 20m/s to come to a stop without friction, obstacles, or breaks ?
63. ### Physics

Find the range at an arrow that leaves a bow at 45 m/s at an angle of 50 degrees above the horizontal level.
64. ### Physics

What is the magnitude of the momentum of the 0.057-kg tennis ball when it travels at a speed of 29 m/s? Earth is the frame of reference.
65. ### physics

calculate the maximum working current of an appliance rated at 2.4kw with an operating voltage of 240v
66. ### physics

calculate the maximum working current of an appliance rated at 2.4kw with an operating voltage of 240v
67. ### Physics

A ball is thrown vertically upward with a velocity of 30m/s. Determine the maximum height reached
68. ### Physics

What is the total time of flight of an object projected vertically upwards with a speed of 30m/s? (g=10m/s^2
69. ### physics

When the ray of light travels from air to glass slab and strikes the surface of separation at 90 degree , then it ..........
70. ### Physics HW Plz help

Why can't most objects like an apple travel at speeds above the speed of light?
71. ### Physics

How much work is required to bring a 1000 kg racing car traveling at a speed of 60 km/hr to rest?
72. ### Physics

A boy sliding down a frictionless plane inclined at an angles 35° with the horizontal. What is the acceleration of the book?
73. ### Physics

the current in an rc circuit if the resistance is 20 ohms the capacitance is 0.002 farad the emr is 12e^-10t
74. ### Physics

Q1. What is the working principle of the loudspeaker. Q2.Explain the following:- 1.Beat 2.Shock wave 3.Mach effect.
75. ### Physics

A brick has mass 10kg and dimensions (10*5*20)cm Find the maximum and minimum pressure it can exert on ground
76. ### PHYSICS

A cell phone emits signs in approximately 750 Mhz. Which is the wavelength and energy of this radiation
77. ### PHYSICS-

Given a plastic rod and fur,explain how you would charge the electroscope positively and negatively.
78. ### Physics

An engine works between the two temperatures 200 C and 120 C. Calculate its efficiency in percentage?
79. ### Physics

An object of weight W hangs by three ropes as shown above. What is the value of the angle @ if T1 = T2 = W? ____________ \@ @/ T2\ /T1 \__/ |W| a) 15 b) 30 c) 40 d) 45 e) 60
80. ### Quick physics help

you hear a thunder 4 seconds after you see the lightning. how far away is the storm?
81. ### physics

What is quantity of heat required to melt down completely 1kg of ice at 30 degree celsius
82. ### Physics

A period pulse travel a distance at 20m in 1•00sec,if it's frequency is 2•0×10.calculate the wave length
83. ### Physics

What is the longest wavelength of light that can be absorbed by a hydrogen atom that is initially in the second excited state?
84. ### physics

an object undergoes an acceleration of 10m/s2 starting from rest. find the distance travelled by it in seconds
85. ### physics

a particle starts moving from rest with uniform acceleration . it travels a distance y in the next 2 sec
86. ### Physics

The distance between any two points in a thermometer is 10cm.mercury level is 13 cm .temperature in Celsius?
87. ### University of jos,physics

A man walks 3m north then 4m east.calculate his displacement from the starting point.
88. ### Physics

how many coulombs must be on one object for it to be repelled with a force of 6.0 N by a second charge of 2.0uC at a distance of 1.0 m?
89. ### Physics

In general, what conditions with observable effects make magnets interact with non-magnet materials?
90. ### physics (Simple harmonic motion)

X(t)=0.142sin(2t+0.19) b) Find the travelled distance by block at t2=3.5min [37.963m].
91. ### Physics

A rocket is ignited and gone up. After that it returns to the ground. How to draw a displacement time of the same ?
92. ### Physics

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

A bean jumps off a table and when it reaches have its height it has a speed of 10 m/s, how high does it rise?
94. ### 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).
95. ### physics

how large a fore (in newtons) is needed to accelerate a 5 metric-ton vehicle from rest to a speed of 10 km/hr in 4 s?
96. ### physics

A plane flies at 150m/s at 35 degrees east of north. It encounters a wind from the west blowing 26 m/s.
97. ### physics

How can the LIGO gravity wave detector achieve a measurement accurate to 1/1000 of a proton's diameter
98. ### Physics

What is the centripetal acceleration of an automobile driving at 40 km/h on a circular track of radius 20m? Help ASAP please!!!
99. ### physics

Calculate the velocity time graph of a body at rest is given an initial uniform acceleration.
100. ### physics

Calculate the velocity time graph of a body at rest is given an initial uniform acceleration .