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A ball rolls off a 1.5 m tall horizontal table and lands on the floor .70 m away.
a. How much time is the ball in the air?
b. How does that time compare with the time it takes for a dropped ball to fall that same distance.
c. What is the ball's velocity while it was on the table top?
d. What is the horizontal component of its velocity just prior to impact?
e. What is the vertical component of its velocity just prior to impact?
f. What is the magnitude of its velocity just prior to impact?
g. What is the direction of its velocity just prior to impact?
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The horizontal acceleration of a projectile
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On a dry day, just after washing your hair to remove natural oils and drying it thoroughly, run a plastic comb through it. Small bits of paper will be attracted to the comb. Explain why.
The pane is 1.8m high, 1.5m wide, and 8.0mm thick. If the temperature at the inner surface of the glass is 28?C and that at the outer surface 4.0 ?C, and the heat transfer is in a steady state, how much heat is lost by conduction through the window e..
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