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A step-down transformer (turns ratio = 1:8) is used with an electric train to reduce the voltage from the wall receptacle to a value needed to operate the train. When the train is running, the current in the secondary coil is 1.94 A. What is the current in the primary coil?
A 0.95 102 g mass of tungsten at 100.0°C is placed in 2.10 102 g of water at 20.0°C. The mixture reaches equilibrium at 21.6°C. Calculate the specific heat of tungsten
An asteroid is discovered heading straight toward Earth at 13 . An international team manages to attach a giant rocket engine to the asteroid. The rocket fires for 10 , after which the asteroid is moving at 29 to its original path at a speed of 18..
Notes produced by a violin range in frequency fromapproximately 196hz to 2637hz. what is the minimum wavelength produced
A hair dryer has a power rating of 1400 W at 110 V rms. Assume the hair dryer circuit contains only resistance. What is the rms current drawn by the hair dryer
The burning of fuel transfers 3. 105 W of power into the engine of a 2400-kg vehicle. determine the maximum speed the vehicle can achieve
You drop a 297-g silver figure of a polar bear into the 245-g aluminum cup of a well-insulated calorimeter containing 257 g of liquid water at 22.7°C. What is the final temperature of the water, cup, and bear
Take the questionnaire of Psychology and Your Life. Are you more consistent with right or left brain orientation? How will your strengths help you with your future goals.
We've seen that fish can control their buoyancy through the use of a swim bladder, a gas-filled organ inside the body. What will the volume of the swim bladder be if the fish ascends to a 42ft depth without changing the quantity of gas
The number of radioactive nuclei in a particular sample decreases to one-eighth of the original amount in 21 days. What is the half-life of the these nuclei
The surfer is catching a wave. Suppose she starts at the top of the wave with a speed of 1.5 m/s, how much work is done by the (nonconservative) force of the wave
A total of 3.04 106 electrons are placed on an initially uncharged wire of length 1.23 m. find the magnitude of the acceleration of a proton
A 130 g ball with speed 7.5 m/s strikes a wall perpendicularly and rebounds in the opposite direction with the same speed. find the magnitudes of the average force on the wall
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