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A student pulls a box of books on a smooth horizontal floor with a force of 100 N in a direction of 37.0o above the horizontal. If the mass of the box and the books is 40.0 kg, what is the normal force on the box?
In a Young's double-slit experiment, a set of parallel slits with a separation of 0.150 millimeter is illuminated by light having a wavelength of 584 nanometer, Find the difference in path lengths from the two slits to the location of a third order..
A box contains 10000 gas molecules, 7500 of argon and 2500 of nitrogen in thermal equilibrium. Find what is the temperature of this gas
Suppose that a grandfather clock a simple pendupum device is running slowly. the time it takes to complete each cycleis longer than it should be. should one shorten or lenghten the pendulum to make the clock keep the correct time? explain?
A rectangular trough, 1.9m long, 0.50m wide, and 0.30m deep, is completely full of water. at what speed does water emerge from the hole
How much more gravitational potential energy does a 1.8kg hammer have when it is on a shelf 1.4m high than when it is on a shelf 0.90m high
Two 10-cm-diameter charged rings face each other, What is the electric field at the center of the left ring
Do you think the average drop time is more accurate than any of the individual drop times? Sometimes many trials are run and recorded
A 20kg box slides 45m from the top down to the bottom of an incline that is 10 degrees to the horizontal. How much work is done by the force of gravity on the box
The intake in the figure has cross-sectional area of 0.79 m2 and water flow at 0.44 m/s. What is the pressure difference between inlet and outlet
An unstable particle at rest breaks up into two fragments of unequal mass. The mass of the lighter fragment is 2.70*10-28 kg and that of the heavier fragment is 1.65*10-27 kg. If the lighter fragment has a speed of 0.893c after the breakup, what is t..
A 51.5-g Super Ball traveling at 29.5 m/s bounces off a brick wall and rebounds at 19.0 m/s. What is the magnitude of the average acceleration of the ball during this time interval
An Automobile engine slows down from 4500 rpm to 1200 rpm in 2.50 s. Calculate (a) its angular acceleration, assumed constant and (b) total number of revolutions the engine makes in this time.
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