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An audio amplifier delivers to the speaker alternating voltage at audio frequencies. If the source voltage has an amplitude of 18.0V, R=7.60 ohms and the speaker is equivalent to the resistance 10.4 ohms, what is the time-averaged power transferred to it?
A neutron star has a mass of 2.0*10^30 kg (about the mass of our sun) and a radius of 5.2*10^3 m (about the height of a good-sized mountain). assume an object falls from rest near the surface of such a sta
Calculating magnetic flux, induced current & magnetic field.
Sketch a force diagram for the desk.
For many years Colonel John P. Stapp, USAF, held the world's land speed record. He participated in studying whether a jet pilot could survive emergency ejection.
a 19.2 kg sled is being pulled across a horizontal surface at a constant velocity. determine the coefficient of kinetic friction
What is the formula for the acceleration a of the cart in terms of the cart's mass M, the hanger's mass m, and the acceleration of gravity g?
A uniform rope of mass m and length L is hanging straight down from the ceiling. A small-amplitude transverse wave is sent up the rope from the bottom end. Derive an expression that gives the speed v of the wave on the rope in terms of the distanc..
A uniform rod of mass 2.95×10?2kg and length 0.380m rotates in a horizontal plane about a fixed axis through its center, What is the angular speed of the rod
In the annual battle of the dorms, students gather on the roofs of Jackson and Walton dorms to launch water balloons at each other with slingshots, Find the direction of the balloon's inital velocity
It is 150 cm from your eyes to your toes. You are standing 196 cm in front of a tall mirror. How far is it from your eyes to the image of your toes.
When responding to sound, the human eardrum vibrates about its equilibrium position, what is the frequency (in Hz) of the eardrums vibration
An ac voltage source is connected in series with a1.4-?F capacitor and a 690-? resistor. Using a digital ac voltmeter, the amplitude of the voltage source is measured to be 4.0?V rms, Determine the frequency of the ac voltage source
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