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A mass vibrates back and forth from the free end of an ideal spring of spring constant 20 N/m with an amplitude of .3 m. What is the kinetic energy of this vibrating mass when it is .3m from its equilibrium position?
a) .9 J
b) .45 J
c) zero
d) it is impossible to give an answer without knowing the object's mass
Dez pours a liquid (n = 1.43) into a container made of glass (n = 1.51). Find the angle of the corresponding refracted ray
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A piece of Nichrome wire has a radius of 5.2 x 10-4 m. It is used in a laboratory to make a heater that dissipates 3.50×102 W of power when connected to a voltage source of 100 V. Ignoring the effect of temperature on resistance, estimate the necessa..
A rotating fan completes 1200 revolutions every minute. Consider a point on the tip of a blade, at a radius of .20 m.
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The longest recorded pass in an NFL game traveled 84 yards in theair from the quarterback to the receiver. Assuming that thepass was thrown at the optimal 45 degree angle, what was the speed at which the ball left the quarterbacks hand?
the frequency of a tuning fork can be found by the method shown. a long tube open at both ends is submerged in a beaker
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