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A collie drags its bed box across a floor by applying a horizontal force of 8.0 N. The kinetic frictional force acting on the box has magnitude 5.0 N. As the box is dragged through 0.70 m along the way, what are (a) the work done by the collie"s applied force and (b) the increase in thermal energy of the bed and floor?
q1. a ball tied to the end of the string is swung in a vertical arc of radius r under the action of gravity. what would
An ideal monatomic gas is the working substance of a Carnot engine. During the isothermal expansion the volume doubles. Compute the temperature of the reservoirs between which the engine operates
The Hubble Space Telescope (HST) is on a circular, low-Earth orbit, at an elevation h = 600 km above the Earth's surface. The orbital period is about 5800 seconds. For an observer who sees HST pass through the zenith, how long is HST above the horizo..
In a common but dangerous prank, a chair is pulled away as a personis moving downward to sit on it, causing the victim to land hard onthe floor. Suppose the victim falls by 0.50 m, the mass that moves downward is 70 kg, and the collision on the fl..
A ball weighing .5 kilogram is dropped from a height of 10 meter. Find its momentum after .75 sec and Find its momentum just before it hits the ground
how to Calculate the horizontal distance the ball would travel if the same spring were aimed 32 deg from the horizontal.
A 6500 kg helicopter accelerates upward at 0.59 m/s2 while lifting a 1210 kg car. What is the lift force exerted by the air on the rotors?
A flexible chain weighing 37.0 N hangs between two hooks located at the same height. Find the magnitude of the force each hook exerts on the chain
An electron beam is deflected upward through a 3.0 mm whiletraveling in a vacuum between two deflection plates 12.0 mm apart. What is the kinetic energy of each electron
two large parallel conducting plates each having an area of 2.00 m2 are 6.25 mm apart and have charges of equal
Two ice skaters push off of one another. Paul has a mass of 65 kg and an acceleration of 5 m/s2 south. Tom has a mass of 75 kg, what is his acceleration
an object on a horizontal spring oscillates with a period of 1.20 s and an amplitude of 10.0 cm. at t 0 s the object
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