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When a car's starter is in use, it draws a large current. The car'slights draw much less current. As a certain car is starting, the current through the battery is 58.2 A and the potential difference across the battery terminals is8.82 V. When only the car's lights areused, the current through the battery is 1.86 A and the terminal potential difference is10.7 V. Find the battery's emf. Find the internal resistance.
A skateboarder, starting from rest, rolls down a 12.2-m ramp. When she arrives at the bottom of the ramp her speed is 8.61 m/s. Determine the magnitude of her acceleration, assumed to be constant
A plane leaves the airport in Galisto and flies 175 km at 68.0^circ east of north and next changes direction to fly 260 km at 48.0^circ south of east, after which it makes an immediate emergency landing in the pasture.
A boy stands at the peak of a hill which slopes downward uniformly at angle φ. At what angle θ from the horizontal should he throw a rock so that it has the greatest range?
A step-down transformer has 16,000 turns on the primary and 95 turns on the secondary. If the rms emf across the secondary coil is 120 V, Elucidate the maximum emf across the primary coil?
A spring-loaded toy gun is used to shoot a ball of mass straight up in the air, Find v_m the muzzle velocity of the ball
If you lift the front wheel of a poorly maintained bicycle off the ground and then start it spinning at 0.72 , what is the magnitude of the frictional torque
A uniformly accelerated car passes three equally spaced traffic signs. The signs are separated by a distance d = 25 m. The car passes the first sign at t = 1.3 s, What is the magnitude of the acceleration of the car
a tungsten target is struck by electrons that have been accelerated from rest through a 29.9-kv potential difference.
An ultralight plane and pilot have a total mass of 156 kg. what is the net force acting on the plane and pilot
Consider a 80.0-kg man standing on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.46 m/s in 0.550 s. It travels with this constant speed for the next 5.00 s.
A toy cannon uses a spring to project a 5.31-g soft rubber ball. The spring is originally compressed by 5.04 cm and has a force constant of 7.96 N/m. At what point does the ball have maximum speed
A cup of water is heated with a heating coil that delivers 117.85 W of heat. In one minute, the temperature of the water rises by 29.47 C. What is the mass in grams of the water
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