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A 100 kg scaffold is 6 m long. It is hanging with two wires, one from each end. A 500 kg box sits 1.6 m from the left end. What is the tension in the left hand side wire?
You want a screen to be illuminated with an intensity of 440 mW/m2. The screen is 12.97 m away from the light source, What is the rms value of the electric field at the screen
A 2-kg book with no initial velocity slides down an inclined plane with an angle of 20 degrees a total of 2 meters. The force of friction does 10 Joules of work, what is the final kinetic energy of the system as the book reaches the bottom of the ..
A spaceship of mass 2.20×106kg is cruising at a speed of 4.20×106m/s when the antimatter reactor fails, blowing the ship into three pieces
A sled weighs 100N. It is held in place on a frictionless 20 degrees slope by a rope attached to a stake at the top, the rope is parallel to the slope. What is the normal force of slope acting on the sled.
A metal sphere centered at the origin has a surface charge density that has a magnitude of 24.1 nC/m2 and a radius less than 2.00 m. What is the sign of the charge on the sphere
You have a great summer job working in a cancer research laboratory. Your team is trying to construct a gas laser that will give off light of an energy that will pass by the skin but be absorbed by cancer tissue.
Red light of wavelength 670.0 nm produces photoelectrons from a certain photoemissive material. What is the material's work function
A rocket burns fuel at a rate of 200 kg/s and exhausts the gas at a relative speed of 4.0 km/s. Find the thrust of the rocket
A cannon shoots a ball with an initial velocity of 152-m/s and a launch angle of 62°. The gravitational acceleration is 9.80 m/s2. Assuming no air resistance, how long would the cannonball stay in the air.
An X-ray photon with a wavelength of 0.260 nm scatters from a free electron at rest. Find the final momentum of the photon
Consider a resistor (R=1000 kΩ) and a capacitor (C=1mF) connected in series. Find the maximum charge on the capacitor
A 3.50 x 10^2 N child is in a swing that is attached to ropes 1.75 m long. find the gravitational potential energy associated with the child relative to her lowest postion. What is the net charge inside the die.
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