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A certain ampli?er has an input voltage of 100 mV rms, an input resistance of 100 k?, and produces an output of 10 Vrms across an 8-? load resistance. The power supply has a voltage of 15 V and delivers an average current of 2 A. Find the power dissipated in the ampli?er and the efficiency of the ampli?er.
After the skier on the hill had been moving for 5.0 s, friction of the snow suddenly increasedmaking the net force on the skier zero. what is new coefficient of friction? how fast would the skier now be going after skiing for 5.0s.
Calculate the eclectic force between a stationary proton and Uranium nucleus
A rocket engine can accelerate a rocket launched from rest vertically up with an acceleration of 19.3 m/s2. What is the velocity of the rocket
Two sources emit waves that are in phase with each other. What is the largest wavelength that will give constructive interference at an observation point 161 m from one source
A plank 2.00 cm thick and 17.5 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m horizontally over the sea below. find the shear modulus of the wood
question 1. a small sphere with a charge of -0.571 c is placed in a uniform electric field of magnitude 1.20 x 106 nc
Modern computer memories use parallel-plate capacitors to store information, and these capacitors are the basic elements of a random-access memory (RAM) chip. What is the capacitance of the RAM capacitor
Consider a fusion reaction in which a proton fuses with a neutronto form a deuterium nucleus. How much energy (in MeV) is released in this reaction
When a current flows in an aluminum wire of diameter 4.97mm, the drift speed of the conduction electrons is 1.49x10^-4 m/s. What is the electron current in the wire
A flat sheet of crown glass has a thickness of 2.3 cm. It is on top of a flat sheet of crystalline quartz that has a thickness of 1.6 cm. how far would it have traveled in a vacuum
A 100-g cube of ice at 0 C is dropped into 1.00 kg of waterthat is originally at 80.0 C. What is the final temperature of the water after it is melted
A 60 kilogram person stands on a scale inside of an elevator. The elevator is accelerating upward at a speed of 2.2 m/s2. Obtain how much does the scale read
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