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A) The electric starter in an automobile equipped with a 12 V battery draws a current of 90.00 A when in operation. Suppose it takes the motor 3.30 s to start the engine. What amount of electric energy has been withdrawn from the battery?
B) The automobile is equipped with a generator that delivers 6.30 A to the battery when the engine is running. How long must the engine run in order for the generator to restore the energy in the battery to its original level?
Suppose that a block is pulled at a constant velocity with a constant force in the presence of sliding friction. What is the net force on the block while it is moving at a constant velocity from point a to point b
A 5kg box is pushed across a level floor with a net force of 50 N in the direction of the displacement of 10m. What is the total work done on the box
A muon with rest energy 106 MeV is created at an altitude of 4600 m and travels downward toward Earth's surface. What is the muon's total energy in the Earth observer's frame of reference
A microscope uses an eyepiece with a focal length of 1.65 cm . Using a normal eye with a final image at infinity, What is the magnification of the microscope
After crossing the finish line, the marathon runner stops, and then performs a celebratory vertical jump. what was the avg. force of the vertical ground reaction force
A magnetic field is perpendicular to a 0.0417 m x 0.0636 m rectangular coil of wire that has 108 turns, What is the magnitude of the change in the magnetic field
In a skating stunt known as "crack-the-whip," a number of skaters hold hands and form a straight line. find the magnitude of the centripetal force that acts on him
A parachutist of 60 kg descends at a constant speed of 4.4 m/s. What is the rate of increase of entropy of the parachute
Two guns aimed at 10 degrees above the horizontal are fired at the same time, bullet A travels at twice the speed of bullet B. Which bullet will hit the ground first
The electric potential at a position located a distance of 21.0 mm from a positive point charge of 6.90×10-9C, Calculate the value of the second charge
A circuit containing a 8 H inductor has an alternating current supplied to it. If Irms is 5.6 A and Vp is 25 V, find the frequency of the signal
On a workday the average decibel level of a busy street is 69 dB, with 102 cars passing a given point every minute. If the number of cars is condensed to 39 cars every minute on a weekend, what is the decibel level of street.
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