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An 78.0 N box is pulled21.0 m up a 30° incline by anapplied force of 101 N that pointsupward, parallel to the incline. If the coefficient of kineticfriction between box and incline is 0.220, calculate the change inthe kinetic energy of the box.
How large a pressure in pascals would be required to compress water by 10 percent? How high a column of water (in kilometers) would be needed to furnish this pressure?
A heat engine has an efficiency of 25%, and its heat input is 600 J per cycle from the high-temperature reservoir
What is the kinetic energy of a 0.5-kg object moving at a constant speed of 2 m/s, A physics-110 student needs 500 W of Power to climb two flights of staris to get to the physics class room in 40 s
q1. water flows over victoria falls which is 128 m high at an average rate of 1.6 times 106 kgs. the acceleration of
Astronomers can detect extrasolar planets by observing the slightwobble of stars due to the gravitational forces between the starsand the planets. The Sun wobbles about the center of mass of the solar system
An airtight box having a lid with an area of 13.9 in2 ( 89.68 cm2 ) is partially evacuated. what is the air pressure in the box
a curve in a road forms part of a horizontal circle. as a car goes around it at constant speed of 14m/s the horizontal total force on the driver has magnitude 147n, find the total horizontal force at the same curve
Two blocks slide on a horizontal, frictionless surface with two springs on opposite sides. Block A has mass 1.14 kg and Block B has mass 3.27 kg. What is the maximum compression of Spring 2
the man and the platform together weigh 1200 N. The pulley can be modeled as frictionless. Elucidate how hard the man has to pull on the rope to lift himself steadily upward above the ground.
A typical Major League fastball is thrown at about 99 mph and with a spin rate of 103 rpm. If the distance between the pitcher's point of release and the catcher's glove is exactly 65.5 ft, how many full turns does the ball make between release and c..
Two blocks hang from either end of a massless rope that runs over a pulley, treated as a thin solid disk, (An Atwood's Machine), and are held in place. Find the unknown mass of the block
question1an observer moving at a speed of 0.995c relative to a rod measures its length to be 2.00 m and sees its length
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