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A 30.0 kg hammer strikes a steel spike 2.30 cm in diameter while moving with a speed of 20.0 m/s. The hammer rebounds with a speed of 10.0 m/s after a brief collision time estimated at 0.110 s. What is the average strain in the spike during the impact?
What is the relationship between electric potential and electric field, If we know the electric potential everywhere in a region
A battery has an emf of 15.0 V. The terminal voltage of the battery is 11.0 V when it is delivering 22.0 W of power to an external load resistor R.
A popular pastime is to see who can push an object closest to the edge of a table without its going off. You push the 100 g object and release it 1.50 from the table edge. what was the object's speed as you released it
Unpolarized light passes through 5 parallel ideal polarizing filters. What is the ratio of the initial intensity to the final intensity of the light
By how much does the air pressure in a house increase if the house is sealed and the air temperature increases from 12.2° C to 19.1° C
Draw a free body diagram for each situation and find the magnitude of the larger of the two individual forces in units of N. Find out the magnitude of the smaller of the individual forces in units of N.
If the radius of the Earth is 6380km and its mass is 5.98X10^24 , determine the actual average density of the Earth
A high diver leaves the end of a 5-m-high diving board, and strikes the water 1.3 s later, 3 m beyond the end of the board. determine the velocity with which she enters the water
A 80.0cm3 box contains helium at a pressure of 2.30atm and a temperature of 90.0?C. What is the final pressure in each box
Calculate the specific heat of a metal from the following data. A container made of the metal has a mass of 3.3 kg and contains 15 kg of water. A 1.0 kg piece of the metal initially at a temperature of 170°C is dropped into the water
A proton is released from rest at the positive plate of a parallel-plate capacitor, What will be the proton's final speed if the experiment is repeated with double the amount of charge in each capacitor plate
A "swing" ride at a carnival consists of chairs that are swung in acircle by 12.0 m cables attached to a vertical rotating pole, asthe drawing shows. (θ = 66.0°) Suppose the total mass of a chair and its occupant is 234 kg.
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