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A small rubber ball is launched by a compressed-air cannon from ground level with an initial speed of 18.9 m/s directly upward. Choose upward as the positive direction in your analysis.
(a) How long does it take to reach the maximum height?
s
(b) How long does it take to reach the ground after it reaches its highest point?
(c) What is its velocity just before it hits the ground? (Indicate the direction with the sign of your answer.)
m/s
The pendulum pictured above has a length of 15.0 cm when it is displaced to the right of the peg, Determine the period for this pendulum close to the surface of the Earth
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Suppose a 65 kg person stands at the edge of a 6.5 m diameter merry-go-round turntable that is mounted on frictionless bearings and has a moment of inertia of 1850 kg m2. Calculate the angular velocity of the turntable
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A proton and an electron are held apart a distance of one meter, Calculate the electric force F between them and Show the electric force vector on each of them
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A spring has an unstretched length of 12cm. When an 80 g ball is hung from it, the length increases by 4.0 cm. What is the period of the oscillation
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The sound level measured in a room by a person watching a movie on a home theater system varies from 65 dB during a quiet part to 95 dB during a loud part
A patient is going to be prescribed bifocals which will be 3.20 cm from the eye, Without the bifocals, what is the patient's near point
A nonconducting spherical shell of inner radius R1 and outer radius R2 has a uniform volume charge density ?. find the total charge on the shell
Two blocks of mass 2kg and 4 kg are held together by a string force of 10N is applied on 2kg and 20N on 4kg find the tension in the string connected between two blocks
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