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A pendulum bob of length L has its motion interrupted by a peg vertically beneath the support. The bob is released when the string is horizontal. Find the minimum value for y in order for the bob to swing in a complete circle. Express this value of y in terms of L only.
In some Rutherford scattering experiments, the alpha particles had kinetic energies of 7.7MeV
Consider light with an initial intensity, I0. Calculate the fraction of light that gets through the following setups: (a) A single polarizer, (b) Two polarizers with their transmission axes 30 degrees apart
In a head-on collision, a car stops in 0.12s from a speed of 19m/s. What force is applied to the driver by his seat belt
You need to push a box across the room. which side of the box should be the side down on the floor
A series ac circuit contains a 270-\;{\rm{ }}\Omega resistor, a 10.0-\;{\rm mH} inductor, What is the average power delivered to the resistor, to the capacitor, and to the inductor
A water heater consisting of a metal coil that is connected across the terminals of a 21.0-V power supply is able to heat 160. What is the resistance of the coil
A ball of mass moving with velocity strikes a vertical wall. What is the magnitude of the average force exerted on the ball by the wall
An astronaut on the planet Vimrom IV finds that she can junp a maximum horizontal distance of 13.0 m if her initial speed is 4.90 m/s. what is the maximum height about the ground reached by the astronaut
A 0.51 kg mass at the end of a spring vibrates 9.0 times per second with an amplitude of 0.18 m. Determine the total energy of the system
Two 11-cm-diameter electrodes 0.54cm apart form a parallel-plate capacitor. What are the charge on each electrode, the electric field strength inside the capacitor
You are to determine the power rating of the motor in an elevator system. The elevator (with a full load) weights 2000 kg and is required to move upward 3 m/sec at constant speed.
The flowmeter shown in the figure measures the flow rate of water in a solar collector system. what is the volume flow rate
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