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An early method of measuring the speed of light makes use of a rotating slotted wheel. A beam of light passes through a slot at the outside edge of the wheel, as in Fig. 10-31, travels to a distant mirror, and returns to the wheel just in time to pass through the next slot in the wheel. One such slotted wheel has a radius of 5.0 cm and 220 slots at its edge. Measurements taken when the mirror is L = 620 m from the wheel indicate a speed of light of 3.0 x 105 km/s.
(a) What is the (constant) angular speed of the wheel?
(b) What is the linear speed of a point on the edge of the wheel?
A satellite in a circular orbit around the earth with a radius 1.011 times the mean radius of the earth is hit by an incoming meteorite. Calculate the amount of that work converted to heat
Suppose that you find the volume of all the oceans to be 1.4\times10^9\; \rm km^3 in a reference book. What is this volume in cubic meters
One morning in New York City at 9:AM, Larry looks south and sees the moon is due south. Suppose Curly were to look at the Earth again 7 days later. What would the apparent shape of the Earth be
From a cliff 9.5 above a river, a young women of mass m = 45kg, jumps from rest, straight down into the water. At the instant she strikes the water, what is her de Broglie wave length
A laboratory electromagnet produces a magnetic field of magnitude 1.38 T. A proton moves through this field with a speed of 6.06 multiply.gif 106 m/s. find the magnitude of the maximum acceleration of the proton
A person is nearsighted and can clearly focus on objects that are no farther than 2.6 m away from her eyes. What is the focal length of the borrowed glasses
Two large speakers broadcast the sound of a band tuning up before an outdoor concert. The speed of sound on this particular day is 336.2 m/s. how far must he walk between "loud" spots
A 49.0 g ball of copper has a net charge of 1.7 µC. What fraction of the copper's electrons have been removed
You have an awkwardly shaped object with an inertia of 1.5kg that has a tiny hook at one end. What is the moment of inertia of the object
An unknown nucleus has twice the volume of a nucleus with 83 nucleons. What is the atomic mass number of the unknown nucleus
The activity (decays per second) of a certain radionuclide is observed to decrease by 87.5% in 30 hours. What is the half life T(1/2) of the radionuclide
An athlete swings a ball, connected to the end of a chain, in a horizontal circle. What is the centripetal acceleration of the ball at 8.28 rev/s
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