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A cooling fan is turned off when it is running at 900rev/min . It turns 800 revolutions before it comes to a stop. What was the fan's angular acceleration, assumed constant? How long did it take the fan to come to a complete stop?
There are 2 spaceships, A and B, that approach the earth from opposite directions. Now according to an observer on spaceship A, she approaches the earth at 0.7c.
Fourteen moles of an ideal monatomic gas expand isothermally at a temperature of 75°C. what is the heat flow into the gas
A wheel is rotating freely with an angular speed of 20 rad/s on a shaft whose moment of inertia is negligible. Calculate the angular speed of the coupled wheels
A person walks first at a constant speed of 5 m/s along a straight line from point A to point B, How much distance does the person cover on her trip
One afternoon, you are playing on a wooden basketball court with a hula?hoop to amuse yourself. The hoop has a mass of 500g and a radius of 55 cm. What is the hoop's speed just before it hits the wall
A scuba diver has his lungs filled to half capacity (3 liters) when 10 m below the surface. what will the volume of the lungs be (in liters) at the surface
A boat crosses a river with constant velocity with respect to the water, v=0.3 m/s. The boat%u2019s velocity is directed perpendicular to the shores of the river. Find the drift s of the boat along the river when it reaches the opposite shore
A soprano sings the note C6 (1046 Hz) across the mouth of a soda bottle. To excite a fundamental frequency in the soda bottle equal to this note, describe how far the top of the liquid must be below the top of the bottle. The top of the liquid mus..
question two kids are on a merry-go-round. the boy located 3m from the center of the merry-go-round is feeling a
A ship sets out to sail to a point 141km due north. An unexpected storm blows the ship to a point 138 km due east of its starting point. (a) How far (in km) and (b) in what direction (as an angle from due east, where north of east is a positive an..
A 2 liter aluminum cylinder at 5 °C is filled to the brim with gasoline at the same temperature. If the aluminum and gasoline are warmed to 60 °C, how much gasoline spills out.
a 100 liter meteorological balloon is filled with helium at stp conditions 25oc and 760 mm hg. what will its volume
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