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An ac power generator produces 24 A rms at 4909 V. The voltage is stepped up to 86000 V by an ideal transformer, and the energy is transmitted through a long-distance power line that has a resistance of 57 , that is nearly in phase with it.
What percentage of the power delivered by the generator is dissipated as heat in the power line?
The cable of the 1900 kg elevator cab shown the figure snaps when the cab is at rest at the first floor, where the cab bottom is a distance d = 4.7 m above a spring of spring constant k = 0.18 MN/m. Find the speed of the cab just before it hits the..
q1. two railroad cars each of mass 6300 kg and travelling 88 kmh in opposite directions collide head-on and come to
A boy of mass 60.0 kg is rescued from a hotel fire by leaping into a firefighters' net. The window from which he leapt was 8.0 m above the net. What is the average force on the net due to the boy during the interval
A muon is a lepton that is a higher-mass (rest mass 105 MeV/c^2) sibling to the electron. By what fraction does the speed of the muon decrease
An RC circuit is connected across a DC voltage source through an open switch. The switch is closed at t = 0 s. Which of the following is a correct statement regarding the circuit
A car of mass 1050 kg is going around an unbanked curve of radius 20 m. what is the normal force of the road on the car
A large box with mass 45 kg is being pushed up a ramp at a 32 degree incline at a constant velocity by a man pushing parallel to the incline of 7.80 m. determine the force the man is pushing on the box
Two boat landings are 1.0 km apart on the same bank of a stream that flows at 1.8 km/h. What is the speed of the boat relative to the water
Describe the operation of a scanning tunneling microscope and explicitly include how it involves barrier tunneling.
A baseball outfielder throws a 0.15 kg baseball at a speed of 40 m/s and an initialangle of 30?. What is the kinetic energy when it hits the ground
A loudspeaker of mass 25.0 is suspended the distance of = 2.40 below ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 2.50. What is the tension in each of cables.
By using integral calculus, find the area of the region bounded by the graphs of y = x^2 and y = 4. (x and y are in meters.) Calculate the rotational inertia of this object when it is spinning around y-axis.
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