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Two kilograms of water at 19 degrees C is heated to 21 degrees C. What was the entropy change for the system (in J/K)?
A thin, horizontal, 10-cm-diameter copper plate is charged to 3.5nC. If the electrons are uniformly distributed on the surface, what are the strengths and direction of the electric field
a 55 kg swimmer is standing on a stationary 175 kg floating raft. the swimmer then runs off the raft horizontally with a velocity of + 3.7 m/s realtive to the shore. Find the recoil velocity that the raft would have
A spherical capacitor is formed from two concentric,spherical, conducting shells separated by a vacuum. The innersphere has a radius of 15 cm. What is the radius of the outer sphere
An 68.0-m-long brass rod is struck at one end. A person at the other end hears two sounds as a result of two longitudinal waves, What is the time interval between the two sounds
Describe what are the (a) magnitude and (b) direction of the boat's velocity relative to the ground? (c) How long does the boat take to cross the river?
a uniform electric field exists in the region between two oppositely charged parallel plates 1.62 cm apart. a proton is
a solid uniform cylinder with mass 8.25 kg and diameter 18.0 cm is spinning with angular velocity 205 rpm on a thin
Some clocks that are powered by an AC voltage use the AC frequencyto keep time. The power company makes this possible by arranging to have precisely the correct number of cycles occur every day, whichkeeps such clocks from gaining or losing time o..
Consider a very long solid insulating cylinder with radius a and with positive net charge 2Q inside a conductor cylinder same length with inner radius b and external radius c with the same central axes and a net charge -Q(radius a
On a day when a thunderstorm is brewing, there could be a vertical electric field of magnitude of 2.00×104 N/C. Calculate the electric flux through the bottom of the car
You are to throw a ball with a speed vo ata target that is height h above the level at which yourelease the ball. You want the ball's velocity to be horizontal atthe instance it reaches the target.
Water flows over Victoria Falls, which is 128 m high, at an average rate of 1.30 106 kg/s. how much power would be produced by these falls
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