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1. A laser beam has a velocity in vacuum of c = 3 x 108 m/s. A student runs an experiment in which a liquid is placed in a tank of length L = 14.1 m. The time it takes for the beam to make it across the tank is timed to be t = 65 ns. Write an expression for the liquid's index of refraction, n. Numerically, what is this index?
2. An automobile starter motor has an equivalent resistance of 0.025 Ω and is supplied by a 12.0 V battery which has a 0.025 Ω internal resistance. What is the current to the motor in A? What voltage is applied to it in V? What power is supplied to the motor in kW?
a constant force f 2.00 ni 3.00 nj acts on a 5.00 kg object as it moves in a straight line from the position r1 1.00
When a potential difference of 12 V is applied to a wire 7.0m long and 0.32mm in diameter the result is an electric current of 2.0 A. What is the resistivity of the wire
A thin film of polystyrene is used as an antireflective coating for fabulite (known as the substrate). What is the minimum thickness of film required
a man with a mass of 80.0 kg is out fishing with his daughter who has a mass of 35.0 kg. they are initially sitting at
When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.39 m. Compute the horizontal distance the ball would travel if the same spring were aimed 28.0 deg from the horizontal.
An 845 kilogram race car can drive around an unbanked turn at a maximum speed of 61m/s without slipping. Find the coefficient of static friction between track and car tires
a water rocket, launched from the ground, rises verticallywith acceleration of 30 /s2 for 1 s when it runs out of fuel. Disregarding air resistance, how high will the rocket rise
Suppose that by stirring 921 g of water you are able to increase its temperature from 19.0° C to 21.0° C. Find the increase in the water's entropy
a 5.1-microc point charge is located atnbspxnbsp 1.1 mnbspynbsp 2.8 m and a -3.9-microc point charge is located
You throw a 151 g ball straight up to a height of 43.0 m. Calculate the average force exerted by your hand while you are throwing it
Two converging lenses are separated with 24.00cm. The focal length of each lens is 12.00cm. An object is placed 36.00cm to the left of the lens that is on the left. Decide the final image distance relative to the lens on the right.
A hollow sphere is rolling along a horizontal floor at 7.0 m/s when it comes to a 39^circ incline. How far does it go up the incline before coming to a stop and roll back down.
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