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A spring-loaded catapult has a spring with spring constant 500 N/m. When loaded, the spring is compressed a distance of .20m. If the catapult is used to shoot a 10 g pellet vertically upward into the air, how high will the pellet rise before falling back down? neglect air resistance.
A 0.31 MeV x-ray photon collides with an electron and scatters straight back the way that it came. What is the energy of the backscattered photon
A circular coil 18.0cm in diameter and containing nine loops lies flat on the ground. The Earth's magnetic field at this location has magnitude 5.50×10?5T, Determine the torque on the coil
a hockey player wants to pass the puck to his team mate. the puck needs to go a distance of 30 meters before coming to a rest. what initial velocity should be given to the puck
An elevator and its load have a combined mass of 1600 kg. Find the tension in the supporting cable when the elevator, originally moving downward at 12 m/s, is brought to rest with constant acceleration in a distance of 28 m.
Assuming wind forces can be neglected, what is the highest that one can make a solid concrete tower of uniform cross-section (Take the density of concrete to be 2,400 kg/m^3)
A loop of wire in the shape of a rectangle rotates with a frequency of 162 rotation per minute in an applied magnetic field of magnitude 3 T, Find the maximum current through the bulb
You are jumping down from a small ledge 0.7 m high onto a concrete floor. what is the force exerted onto your feet during the landing
A series R-L-C circuit is connected to a 170 Hz ac source that has Vrms=80.0 V. What average power is delivered to the circuit by the source
A ball is suspended by a string and moves in a horizontal circle. One such pendulum has a 100g ball at the end of a 1.5 meter long string and has an orbit of radius 30.0cm. Determine the net force acting on the ball and the acceleration
A soap bubble strongly reflects light of 463nm, wavelength, if the index of refraction of the film is 1.35, what is the thinnest thickness the soap film can be
A power supply maintains a potential difference of 86.1 V across a 1070-? resistor. What is the current in the resistor
During liftoff, a hot-air balloon accelerates upward at a rate of 3.5. What is the magnitude of the object's acceleration after it is released (relative to the ground)
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