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A transformer has 350 turns and 94 turns for the primary and secondary respectively. With no load on the secondary and a primary voltage of 297.87 V,
1. what is the output voltage of the secondary?
2. If the secondary is now connected to a load of 13.605 ?, what current flows in the secondary?
3. What current flows in the primary?
How much sound power will strike the eardrum of an airport worker 15.3 m from the aircraft? (Use 1.9 10-2 m as the diameter of the ear.)
A loudspeaker of mass 21.0 {rm kg} is suspended a distance of h = 2.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of l = 3.90 {rm m}.
The magnitude of the air resistance that opposes its downward motion is 258 N. Explain what is the magnitude of the acceleration of the rock?
A particle known as a pion lives for a short time before breaking apart into other particles. According to this hypothetical person, how far does the laboratory move before the pion breaks apart
0.0023 J of energy are stored in a parallel-plate capacitor whose plates each have area 0.30 m2, find the electric field energy density between the plates
A stone is thrown from the top a tall building with initial velocity of 25 m/s, directed at an angle of 30 degrees above the horizontal. how tall is the building
Two long, parallel conductors carry currents I1 = 3.00 A and I2 = 2.50 A, both directed into the plane of the computer screen. Determine the magnitude and direction of the resultant magnetic field at P.
Discover the least value of initial velocity
A movie star catches a reporter shooting pictures of her at home. She claims the reporter was trespassing and to prove her point, How far away from the subject was the reporter standing
A rifle with a barrel length of 59 cm fires a 8 g bullet with a horizontal speed of 350 m/s, What resistive force (assumed to be constant) does the wood exert on the bullet
A soldier has a huge contraption that notches a large 2 kg arrow (it looks more like a lance) in a massive bow and uses a winch system to draw the arrow back to set the bow. What is the speed of the arrow
A 100 kg shot-putter pushes a forward and upward force on a 4 kg shot with a force of 1000N, Calculate the vertical and horizontal components of this resultant force
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