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Calculate the kinetic energy that the earth has because of (a) its rotation about its own axis and (b) its motion around the sun. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States in one year is about 1.1 x 10^20 J.
Compare the kinetic energy of car travelling. Compare the kinetic energy of an 900 kg car travelling at 30 m/s, and a 1,800 kg car at the same speed.
What is acceleration due to gravity
Calculate the magnitude of the electric field at one corner of a square 1.43
A string of 13 identical Christmas tree lights are connected in series to a 127 V source. The string dissipates 63 W. What is the comparable resistance of light string.
The net force on the object is not zero in Tubby's frame, but there is an inertial frame in which net force is zero.
What is the final charge of each conductor. Two identical spherical conductors X and Y are mounted on insulated stands. X carries the charge of +8.0nC and Y carries a charge of -2.0nC.
While on vacation you rent a moped and go cruising around a tropical island. If you take a 10.0° banked curve with a radius of 15.0 meters at 12.0 m/s, what is the minimum coefficient of static friction between your tires and road to keep the tires f..
A person walks first at a constant speed of 5.10 m/s along a straight line from point to point and then back along the line from to at a constant speed of 2.95 m/s. (a) What is her average speed over the entire trip? (b) What is her average veloci..
Calculate the magnitude of the current density in the wire. Find out the work done by the hockey player on the puck. What is the change in kinetic energy of the puck.
A 20 000 N truck is acted upon by the force that decreases its speed from 10.00 m/s to 5.0 m/s in 5.0 sec. What is the magnitude of force.
A motorcycle has a constant speed of 21.0 m/s as it passes over the top of a hill whose radius of curvature is 132 m. The mass of the motorcycle and driver is 343 kg. Determine the magnitude of the normal force that acts on the cycle.
Two charged bodies exert a force of .145N on each other. If they are now moved so they are one fourth as far apart, what force is exerted.
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