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A step-down transformer has 30 turns of wire on one coil and 1200 turns on the other. If the transformer is to produce an rms output voltage of 240 V and an rms current of 12 mA , what is the required rms input voltage?
q1. sound waves of frequency 502 hz enter a window 1.18 m wide. the window is in the exact center of one wall of a
As you stand on a pier looking at a harbor, the waves created by a large freighter come ashore. You estimate the wavelength to be 3.0 m, What is the frequency of the wave in hertz
Water at a pressure of 3.00*10^5 Pa flows through a horizontal pipe at a speed of 1.00 m/s. The pipe narrows to one-fourth its original diameter
On an essentially frictionless, horizontal ice rink, a skater moving at 4.1 m/s encounters a rough patch that reduces her speed by 49% due to a friction force that is 26% of her weight. find the length of this rough patch
Suppose a neutron, traveling to the right at 1000 m/s, strikes a proton moving upward at 500 m/s. Find the magnitude and direction of the deuteron velocity vector
A horizontal wire of 0.52 m carrying a current of 8.2 A is placed in a uniform external magnetic field. Determine the magnitude of the external magnetic field
142.3 cm and not more than 142.6 cm. What is the relative uncertainty of the measurement
Two parallel plates having charges of equal magnitude but opposite sign are separated by 24.0 cm. Determine the force on the proton
An elevator accelerates upward at 1 m/s2. When the elevator is moving upward at 2 m/s, a bolt drops from the ceiling which is 2.5 m above the?
A straight rod of length L = 22.2 cm, carries a uniform charge, ? = 3.00 × 10-6 C/m, What is the magnitude of the electric field at yP = 50.0 cm
If the lumberjack now trots toward the other end of the log with a speed of 2.7 m/s relative to the log, illustrate what is the lumberjack’s speed relative to the shore?
A partly full paint can has 0.42 U.S. gallons of paint left in it. how thick is the layer of wet paint
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