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Question1
How much 235U is consumed per year (in g/y) to produce sufficient electricity to continuously run a 100-W light bulb? How much coal (in g/y) would be essential (coal has a heat content of about 12 GJ/tom)? Assume a conversion efficiency of 33 percent of thermal energy into electrical energy.
Question2
A 0.20 kg stone is held 1.3m above the top edge of water well and then dropped into it. The well has a depth of 5.0m. Relative to the configuration with the stone at the top edge of the well, what is the gravitational potential energy of the stone-Earth System?
(a) Before the stone is released and
(b) When it reaches bottom of the well?
(c) What is the change in gravitational potential energy of system from release to reaching the bottom of the well?
What is the amplitude of subsequent oscillations
Conclude the magnitude of angular acceleration
Illustrates the difference between acceleration and velocity
What is magnitude of the runner total displacement
What is velocity relative to the ice surface
Find out the vertical component of the reaction force
What are angles of refraction
A dockworker applies a constant horizontal force of 84.0\({\rm N}\) to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 12.5\({\rm m}\) in a time 4.80\({\rm s}\)
What is an index of refraction of the liquid
The coefficient of kinetic friction
Problem on a hare and a tortoise battle
What is swimmer velocity relative to the bank
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