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1. A step-up transformer increases 15.7V to 110V. What is the current in the secondary as compared to the primary? Assume 100 percent efficiency.
2. An ideal step-down transformer has a primary coil of 400 turns and a secondary coil of 19 turns. It's primary coil is plugged into an outlet with 120V (AC), from which it draws an rms current of 0.51A.
What is the voltage in the secondary coil?
A child suddenly runs into the street. If it takes the driver 0.80 s to react and apply the brakes, explain how many meters will the car have moved before it begins to slow down?
While rearranging a dorm room, a student does 276 J of work in moving a desk 1.7 m. What was the magnitude of applied horizontal force.
Saturn makes one complete orbit of the Sun every 29.4 years. Calculate the radius of the orbit of Saturn
When t = 0 s, a flower pot on a window sill drops from rest to the sidewalk some 32.0 m below, How long was the pot in flight
A man begins pushing a box from rest up a ramp angled at 22 degrees from horizontal, exerting a constant force of 500N, with what average force will it hit the ground
Many people mistakenly believe that the astronauts orbiting the earth are "above gravity." Compute the acceleration because of gravity, g, for space shuttle territory, 245 kilometres above the earth's surface (dashed line in sketch). Earth's mass ..
Upton Chuck is riding the Giant Drop at Great America. If Upton free falls for 2.6 seconds, what will be his final velocity and how far will he fall
A steam catapult launches a jet aircraft from the aircraft carrier John C. Stennis, giving it a speed of 210 mi/h in 3.00 s. (a) Find the average acceleration of the plane. m/s2 (b) Assuming the acceleration is constant, find the distance the plan..
A step-up transformer has 30 turns on the primary coil and 800 turns on the secondary coil. what input current and voltage are needed
Consider two strings on a violin. They are the same length and have the same tension. What is the mass density of the second string
An old-fashioned (vinyl) record rotates at a constant rate of 45 rpm. how far does a point on the edge travel
A flatbed truck is carrying a load of timber which is not tied down. the mass of the timber is 800 kg, What is the highest acceleration that the truck can have without losing its load
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