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On the Moon\'s surface, lunar astronauts placed a corner reflector, off which a laser beam is periodically reflected. The distance to the Moon is calculated from the round-trip time. The Earth\'s atmosphere slows down light. Assume the distance to the Moon is precisely 3.84 × 108 m, and Earth\'s atmosphere (which varies in density with altitude) is equivalent to a layer 20.0 km thick with a constant index of refraction n = 1.000293. What is the difference in travel time for light that travels only through space to the moon and back and light that travels through the atmosphere and space?
Two identical small insulating balls are suspended by separate 0.22-m threads that are attached to a common point on the ceiling. Each ball has a mass of 8.10 10-4 kg.
Speedy Sue, driving at 30.0 m/s, enters a one-lane tunnel. She then observes a slow-moving van 155 m ahead traveling at 5.00 m/s. obtain the distance of closest approach between Sue's car and the van
A velocity selector has a magnetic field of magnitude .38Tperpendicular to an electric field of magnitude .54 MV/m. The massof a proton is 1.67 X 10^-27 kg. How much energy must protons haevin order to pass through undeflected.
What is the terminal speed for an 76.0kg skier going down a 38.0? snow-covered slope on wooden skis ?k= 0.060
A near-sighted person wears an old prescription, where the power of his glasses is - 3.23 Diopters. What is the far point of this person
two wires parallel to each other and seperated by a distance d carry different currents they exert a force with
Vector A has a magnitude of 12.4 units and points due west. vector B points due north. What is the magnitude of B if A+B has a magnitude of 16.9 units
On the small and good planet Ballonius in a distant solar system, suppose we find the radius of the good planet to be 210,000 m. Estimate the mass of Ballonius
Suppose you wish to fabricate a uniform wire out of 2.6 g of copper. If the wire is to have a resistance of R = 0.25 and if all of the copper is to be used, what must be the length of the wire in m and the diameter of the wire in mm.
Assume that when you ride on your 7.60-kg bike the weight of you and the bike is supported equally by the two tires. If the gauge pressure in the tires is 78.5 lb/in2 and the area of contact between each tire and the road is 7.13 cm2, what is your we..
A galaxy known to be traveling away from the Earth at 0.740 percent of the speed of light is observed on Earth to have a strong peak in its spectrum at 640.0 nm. What is the speed of the dwarf
An automobile and a truck start from rest atthe same instant, with the automobile initially at some distancebehind the truck. What is the speed of each when they are abreast
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