The drill used by most dentists today is powered by a small air-turbine that can operate at angular speeds of 35 rpm. these drills, along with ultrasonic dental drills, are the fastest turbines in the world-far exceeding the angular speeds of jet engines. suppose a drill starts at rest and comes up to operating speed in 2.0 s. how many revolutions does the drill bit make as it comes up to speed?
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Distinguish between a transverse wave and a longitudinal wave.
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A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?
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Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?
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Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity
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The drill used by most dentists today is powered by a small air-turbine that can operate at angular...
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