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The primary window of an electric train transformer has 400 turns, and the secondary has 50. If the input voltage is 120 V, what is the output voltage? if the current in the primary is 2.0 A, what is the current in the secondary?
Suppose the current suddenly increases to 1.55 A in the same direction as before, due to an increase in speed of the bar. Find the emf induced in the rod
A certain Carnot engine produces 200 J of work per cycle, what is the change in entropy of the hot reservoir per cycle
A small but measurable current of 7.70 E-10 A. exists in a copper wire whose diameter is 0.05 cm. Calculate the electron drift speed (in meters/second)
Estimate the rms electric field in the sunlight that hits Saturn, knowing that the Earth receives about 1350 W/m2
Two small particles have charges Q1 = +2.5 ?C and Q2 = ?5.5 ?C. what is the distance between the particles
For a particular RLC series circuit, the capacitive reactance is 2.55 ?, the inductive reactance is 45.5 ?, What is the maximum voltage across the circuit
White light is incident normally on a thin soap film ( = 1.33) suspended in air. What are the two minimum thicknesses that will constructively reflect yellow ( = 577 ) light? Enter your answers in ascending order separated by a comma
A 67.00 kg person on skis is going down a hill sloped at 30° from the horizontal. The coefficient of friction between skis and snow is 0.19. What would be the magnitude of the acceleration.
In order to generate an induced voltage, a coil of cross sectional area 2x10^-4 m^2 is placed in a .4T magnetic field, How many times must the flip coil have to induce a voltage of 120V
A car driving at 20 m/s is approaching a stoplight. As the stoplight turns red, the driver decides that the car is going too fast to stop at the white line and hits the brakes hard. How fast was the car going when the driver changed the rate of dec..
Car traveling east at 40m÷s passes atrooper hiding at the roadside.the driver uniformly reduces his speed to 25m÷s in3,5s....what the magnitude and direction of the car acceleratioas it slow down.
Automobile engine slows down from 4500 rpm to 1200 rpm in 2.5 s. compute (a) its angular acceleration, assumed constant and (b) total number of revolutions the engine makes in this time.
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