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A 75 kg person sits on a 3.9 kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.0 cm in diameter. Find the pressure exerted on the floor by each leg of the chair, assuming the weight is evenly distributed.
Take element Z = 21 from the periodic table. Ionize it 20 times so that there is only one electron left orbiting around the nucleus. What is the ground state energy of the electron
Ground beef may be irradiated with high-energy electrons from a linear accelerator to kill pathogens. What is the average rate (in W) of energy deposition in the beef
A child builds a simple cart consisting of a 0.60 m by 1.20 m sheet of plywood of mass 8.5 kg and four wheels, each 20.0 cm in diameter and with a mass of 1.98 kg. It is released from the top of a 15° incline that is 32 m long.
A carton of bananas weighing 35.0 Newton rests on a horizontal surface. Find what minimum horizontal force must the monkey apply to start the carton in motion
A heat engine operating at maximum efficiency has an efficiency of 25%. The temperature of the cold reservoir is 300 K. What is the temperature of the hot reservoir
A person with normal eyesight uses a converging lens of focal length 10 cm. At what distance from the job he must hold the lens
An alpha particle (charge +2e) is located at a position in space where the electric potential is 2,000 volts. Evaluate the alpha particle electric potential energy
In a certain experiment, the pressure of a gas depends on the volume by P=alphaV^3+betaV^2, What is the work done on the gas
How does the global South's debt problem compare with the U.S. debt in terms of the causes, the magnitude, and the effect on the national and global economy?
How many seconds after the force starts acting on the object does it once again move with the same velocity as it had at t=0s?
An elderly sailor is shipwrecked on a desert island, but manages to save his eyeglasses. What is the magnifying power of the telescope he can construct with these lenses
A pendulum is constructed from a thin, rigid, and uniform rod by a small sphere attached to the end opposite the pivot. This arrangement is a good approximation to a simple pendulum (period =3.72 s), because the mass of the sphere (lead) is much grea..
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