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1. Michelson used the motion of the Earth around the sun to try to determine the effects of the ether. Can you think of a more convenient experiment with a higher speed that Michelson might have used in the 1880s? What about today?
2. If you wanted to set out today to ?nd the effects of the ether, what experimental apparatus would you want to use? Would a laser be included? Why?
3. For what reasons would Michelson and Morley repeat their experiment on top of a mountain? Why would they perform the experiment in summer and winter?
4. Does the fact that Maxwell's equations do not need to be modi?ed because of the special theory of relativity, whereas Newton's laws of motion do, mean that Maxwell's work is somehow greater or more signi?cant than Newton's? Explain.
A wire carries current to the left in a region of space where there is a magnetic field directed upward. what is the direction of the magnet force on the wire?
You toss-up a ball straight up and it leaves your hand at a speed of 20 m/s. How high, in meters, will it rise above the release point? Assume g = 10 m/s/s.
A glass cup is made to vibrate by sound. The rim of the cup has circumference 0.11m. What is the wavelength and frequency
question consider two oppositely charged parallel metal plates. the plates are square with sides l and carry charges q
What is the average kinetic energy of an ideal gas.
A mountain climber looks up a slope and sees an avalanche ofboulders accelerating toward her. The boulders are initially60.0m above, moving at an initial speed of 2.00m/s and acceleratingat 4.00m/s^2.
Blocks of mass 20, 80, and 240 kg are lined up from left to right in that order on a frictionless surface so each block is touching the next one. What is the magnitude of the force that the left block exerts on the middle one
A 10-turn square coil of area 0.036m2 and a 20-turn circular coil are both placed perpendicular to the same changing magnetic field. What is the area of the circular coil
A pulse from a ruby laser (lambda = 694.3 nm) has an average power of 30 MW and lasts 2.9 ns. How many photons are emitted in this pulse
The track is 10.00 cm wide, 5.00 m long, and 2.78 m high, and is solid. The runway is cut such that it forms a parabola by the equation y = (x - 5)2 / 9
A spring with a spring constant of 1.9×102N/m is attached to a1.6 kg mass and then set in motion. What is the frequency of the vibration? What is the period of the mass-spring system?
a 2.60microf capacitor is charged by a 12.0-v battery. it is disconnected from the battery and then connected to an
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