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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.
How long would it take you to cover the 83 length of the walkway if, once you get on the walkway, you at once turns around and start walking in the opposite direction with a speed of 1.7 relative to the walkway.
What is clowns total displacement
How several cubic meters of water are removed from storage under an area of 1 million square meters when the average head decline in this area is 2 meters.
The distance between a loudspeaker and the left ear of a listener is 1.60 m. compute the time required for sound to travel this distance if the air temperature is 20° C.
Two horizontal forces, 249 N and 165 N, are exerted in opposite directions on a crate. What is the net horizontal force on the create? Be sure to point to the direction of the net force.
Two children setup a "telephone" by placing a long, slender aluminium (Y = 6.9 × 1010 N/m2) bar that has a length of 6.1-m between their two houses. To communicate, the child taps a coded message on one end. How long do the sound waves take to reach ..
icyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by Lance Armstrong (m = 75.0 kg) is 6.50 W per kilogram of his body mass.
The two upper front teeth of a person exert a total force of 30N on a piece of steak. If the biting edge of each tooth measures 10 mm x 1 mm, find out the pressure on the steak.
What will be its length and height at rest
An intergalactic rock star bangs his drum every 1.52 s. A person on earth measures that time between beats is 2.10 s. How fast is the rock star moving relative to the earth.
A stand, string, a paper or plastic cup, a nail, a roll of paper towels or similar sized paper, coloured sand, or some other dry powdery product, and a ruler or measuring tape.
Suppose the charge of one is increased by twenty seven times while the charge of the other is reduced to one-third its initial value. What would their separation distance have to be changed to in order to keep the force between them the same?
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