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Assume that the earth is a uniform sphere and that its path around the sun is circular.
a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the United States in one year is about 9.33multiplied by 109 J.
b) Calculate the kinetic energy that the earth has because of its motion around the sun.
A 44 kg women is in a 62 kg, 5 m long boat that is initially at rest. She walks from a spot 1.00 m from one end to a spot 1.00 m from the other end. how fast was the boat moving while she was walking
A Carnot engine absorbs 4.65×103 J from the hot reservoir and expels 3.12×103 J to the cold reservoir during each engine cycle. what is the temperature of the hot reservoir
Inside a sealed wooden box of mass M there hangs, by a thread of negligible mass, a lead pellet also of mass M. What is the acceleration of the center of mass of the system of box
A spaceship approaches Earth with a speed of 0.70c. What is his heartbeat rate according to an observer that is at rest relative to Earth
explain What is the magnitude of the electric field next to the sheet.
carnival ride has a large horizontal steel disc of radius 5m from which cars are suspended by a 6m long chain. the disx is rotated about its axis so that the cars swing out and revolve in a circular path. at operation speed the angle of the chains ..
According to Kepler's third law, the orbital period T of a planet is related to the radius R of its orbit by T2 R3. What is the planet's orbital period
four long parallel wires pass through the corners of a square with side 0.12 m. all four wires carry the same magnitude
A flywheel has a constant angular deceleration of -2.01 rad/s2. Find the angle through which the flywheel turns as it comes to rest from an angular speed of 186 rad/s
A skier is accelerating down a 30.0° hill at a = 4.20 m/s^2. What is the vertical component of her acceleration
an electron is released from rest in a uniform electric field. if the electric field is 1.25 knc at the end of 20 ns
a small sphere carrying a positive charge of 10.0microc is moved against an electric field through a potential
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