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What is the magnitude of the angular acceleration of a 25.0-kg disk of radius 0.800 m when a torque of magnitude 40.0 N · m is applied to it?
A 52% efficient device uses chemical energy to generate 570J J of electric energy. How much chemical energy is used
A radio station is allowed to broadcast at an average power not to exceed 26 kW. estimate how many kilometers away you might be able to hear this station
A certain helium-neon laser pointer, emitting light with a wavelength of 632 nm, How many photons are emitted by the laser pointer
A simple pendulum is 0.50m long. At t=0 it is released from rest starting at an angle of 10 degrees.Ignoring friction, what will be the angular position of the pendulum
One mole of oxygen molecules occupies a cubic vessel of side length 10 cm at a temperature of 18 C. Calculate the pressure of the gas on the walls
If the microphone in problem 3 has an area of 0.750 cm2. What is the power intercepted by the microphone
A jogger travels a route that has two parts. The first is a displacement of 2.70 km due south, and the second involves a displacement that points due east.
An x-ray tube accelerates electrons from rest at 5.0×10 14th m/s(squared) power through a distance of 20cm . (Such high accelerations are possible because electrons are extremely light.) Find the electrons'velocity after this acceleration. Find th..
A 300 lb bungee jumper wants to jump from the top of a 230 ft high bridge and be able to just touch the water below. what should the bungee cord's relaxed length, l, be for this jump
two extremely large nonconducting horizontal sheets each carry uniform charge density on the surfaces facing each other. find the surface charge density on the lower sheet
How many electrons are there in a tablespoon. Find the tension in each cable. right cable and left cable.
A solid sphere is rolling without slipping along a horizontal surface with a speed of 4.50 m/s, What is the speed of the sphere after it has rolled 3.00m up the ramp
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