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A 650 kg elevator starts from rest. It moves upward for 3.50 s with stable acceleration until it reaches its cruising speed 1.75 m/s.
Calculate average power of elevator motor during this period?
Two light sources are used in a photoelectric experiment to determine the work function for a particular metal surface. What stopping potential would be observed when using light from a red lamp (?=668.0nm)
Find the difference of the initial and the final masses for the decay 137N?126C+p. The atomic masses of 137N, 126C,
a particle of charge 13 microc and mass 2.50 x 10-5 kg is released from rest in a region where there is a constant
A C1=25 uF capacitor is charged to 4.0kV and then removed from the battery and connected to uncharged C2=45uF capacitor. which capacitor stores more energy and why
Assuming that all photons reaching the solar cell give their energy to a charge carrier, what is the minimum power of a flash of light of wavelength 540nm that can be detected
The efficiency of a knife is 75%. If you push down on the knife with a force of 5 N to cut a piece of cake that is 6 cm thick, how much work is done on the cake
Suppose one night that the radius of the earth decreased by two (was half as big as normal), What would be the new value for the free fall acceleration
the 500 lbf motor is supported on springs with a total stiffness of 5000 lbfin. the springs have a damping ratio of
If friction and air resistance can be neglected, determine her speed vB when she reaches the horizontal end of the ramp at B.
the period t of a physical pendulum is measured about a certain pivot point a. the measurement is repeated varying the
Normal atmospheric pressure at sea level is generally considered to be equal to the pressure exerted by a column of mercury 760mm high. Calculate the corresponding pressure in inches and in Pascals
two large parallel non-conducting sheets are spaced d 2.80 cm apart and have a potential difference of magnitude 500
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