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When a solid uniform sphere is spinning about an axis through its center, its rotational kinetic energy is K. A second solid sphere having twice the mass and twice the diameter as the first one is spinning about an axis through its center at twice the angular velocity of the first one. Obtain the rotational kinetic energy of the second sphere?
A man pushes a lawnmower for 13.1 m along a handle that makes a 28.2° angle with the ground. He pushes with a force of 42.8 N even as the force of friction between the lawnmower and the ground is 13.7 N.
an airplane has a velocity relative to the air of 194 ms in a westerly direction. if the wind has a speed relative to
Lift on an Airplane. Air streams horizontally past a small airplane's wings such that the speed is 70.0 m/s over the top surface and 50.0 m/s past the bottom surface. If the plane has a wing area of 16.6 m2 on the top and on the bottom, what is th..
Compact fluorescent bulbs are much more efficient at producing light than are ordinary incandescent bulbs. They initially cost much more, but last far longer and use much less electricity.
The average density of a fish can be found by firstweighing it in air and then finding the apparent weight of the fishas it hangs completely immersed in water. what is the average density of the fish
A point on the rim of a 0.70 m diameter grinding wheel changes speed uniformly from 12 m/s to 26 m/s in 7.5 s. What is the average angular acceleration of the wheel during this interval
a solid nonconducting sphere has a radius of 50.0 cm. it has a uniform charge density of 3.00times10-3 cm3. what is the
An 8.0 m, 100 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.40, what is the minimum angle that ladder can make with the floor before it slips.
A car is parked at the top of a 50 {\rm m}-high hill. It slips out of gear and rolls down the hill. How fast will it be going at the bottom
A 3.0 kg particle wiith velocity v=(5.0 m/s)i - (6.0 m/s)j is at x = 3.0 m, y=8.0 m. It is pulled by a 7.0 N force in the negative x direction. a.) What is the angular momentum of the particle about the origin?
A rocket in a fireworks display explodes high in the air. The sound spreads out uniformly in all directions. The intensity of the sound is 2.30 10-6 W/m2 at a distance of 110 m from the explosion. Find the distance from the source at which the int..
The distance between the first and fifth minima of a single-slitdiffraction pattern is 0.25 mm withthe screen 50 cm away from the slit,when light of wavelength 477 nm isused. Calculate the angle of the firstdiffraction minimum
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