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The heels on a pair of women's shoes have radii of 0.5 cm at the bottom. If 30% of the weight of a woman weighing 480 N is supported by each heel, find the stress on each heel?
A transformer is designed to step down the 209 volts to 30 volts. If there are 446 turns on the input coil, how many turns should there be on the output coil
how does the power radiated by an object change if the temperature t of the radiating object changes? here we ignore
a certain elevator cab in a new york hotel has a total run of 180 m. its maximum speed is 302 mmin. its acceleration
A 50-gram mass connected to a spring of force constant 35 N/moscillates on a horizontal, frictionless surface with an amplitudeof 4.0 cm. What is the total energy of the system?
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
A. 0.145 kg baseball is pitched at 42 m/s. The batter hits it horizontally to the pitcher at 58 m/s. What is the change in momentum of the ball
two stationary positive point charges charge 1 of magnitude 3.95nc and charge 2 of magnitude 1.60nc are separated by a
Two people pull as hard as they can on horizontal ropes attached to a boat that has a mass of 200 kg. If they pull in the same direction, the boat has an acceleration of 1.59 m/s2 to the right. If they pull in opposite directions, the boat has..
A rock is dropped from a height of 100 m above the ground. How long after the ball is thrown will the objects be at the same height above the ground
Find the peak magnetic field in an electromagnetic wave whose peak electric field is 200N/C
A Baseball player rounds third base and is heading for home when he is signalled by the base coach to slide. find the coefficient of kinetic friction between him and the ground
An insulated vertical piston cylinder device initialy contains 10kg of water, 6 kg of which is in the vapor phase. Determine the mass of steam that has entered
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