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A girl of mass 42 kilogram throws a ball of mass 0.5 kilogram against a wall. The ball strikes the wall horizontally with a speed of 10 m/s, and it bounces back with this similar speed. The ball is in contact with the wall 0.05 second. Find the average force exerted on the wall by the ball?
In an oscillating LC circuit, 75% of the total energy is stored in the magnetic field of the inductor at a certain time. In terms of Qmax, the maximum charge on the capacitor,
the department of labor would like to estimate the average weekly wages for us adults with a margin of error equal to
An airplane traveling at 480 km/h needs to reverse its course. The pilot decides to accomplish this by banking the wings at an angle of 38o. Find the time needed to reverse course
A 4 kg dog stands on one end of a 20 kg boat. The dog is initially 6 m from the shore, How far has the boat moved after the dog has walked the 2m
question light containing wavelengths of 400 nm 500 nm and 650 nm is incident from air on a block of crown glass at an
Steam at 100°C is added to ice at 0°C, Find the amount of ice melted and the final temperature when the mass of steam is 14.0 g and the mass of ice is 52.0 g
A series RCL circuit includes a resistance of 291 ?, an inductive reactance of 685 ?, and a capacitive reactance of 409 ?. What is the voltage of the generator
The electric field at the point x = 5.00 cm and y = 0 points in the positive x direction with a magnitude of 5.00 N/C. Find the location of the point charge
find the mass of Earth from the period T and the radius r of the Moon's orbit about the Earth. T=27.3 days and r=3.82E5 km. suppose the Moon orbits the center of Earth rather than the center of mass of the Earth-Moon system.
A proton moves through a magnetic field at 31.1% of the speed of light. compute magnitude of the magnetic force acting on the proton
Crate that weighs 20 Newton starts from rest and slides down a rough 5.0 meter long ramp inclined at 25o with the horizontal during this slide 20 Joule of energy is lost due to friction. Evaluate the kinetic force on the crate
Three identical uniform meter sticks are placed on the floor. The first stick lies along the y axis from y = 0.320 m to y = 1.32 m. calculate the location of the center of mass of the meter sticks
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