How far will the ball have rolled from starting point
While rolling balls down an inclined plane, Galileo observes that the ball rolls 1 cubit as he counts to 10. How far will the ball have rolled from its starting point when he has counted to 20?
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A 400 N child is in a swing that is attached to a pair of ropes 2.0 m long. Find the gravitational potential energy of the chile earth system relative to the childs lowest position when the ropes are horizontal.
When the tire surface is rotating at a maximum speed of 1 m/s, the stone flies out of the tread. The magnitude FN of the normal force that each side of the tread channel exerts on the stone is 1.8 N. Assume that only static friction supplies the
A hydrometer is used to measure the specific gravity of liquids. For a certain liquid a hydrometer reading indicates a specific gravity of 1.15. What is the liquid's density and specific weight?
Promiscuous sexual behavior in adolescence can have a wide variety of unfortunate consequences. It is estimated that nearly half of all U.S. high school students have had sexual intercourse.
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One thousand barrels of a 40°API crude are blended with one thousand barrels of a 20°API crude. Estimate the °API of the resulting blend. Clearly state your assumptions and comment on your result. (Hint: Would °API blend linearly?)&nb
When an AC source is connected across a 12.5-Ω resistor, the rms current in the resistor is 8.36 A. Find the rms voltage across the resistor.
A tennis ball of mass 57 g travels with velocity < 48, 0, 0 > m/s toward a wall. After bouncing off the wall, the tennis ball is observed to be traveling with velocity < -42, 0, 0 > m/s. What is the change in the momentum of the tennis
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