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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. What percent correction is needed to account for the delay in time due to the slowing of light in the earth's atmosphere? Assume the distance to the moon is precisely 3.84 x 108 m, and the earth's atmosphere (which varies in density with altitude) is equivalent to a layer 30.0 km thick with a constant index of refraction n = 1.000293.
A voltmeter is connected in parallel to a resistor when measuring Vi. Why is the measured voltage across a 10 M Ω resistor not equal to the voltage measured across a power supply?
Microwaves of wavelength 5.40 cm enter a long, narrow window in a building that is otherwise essentially opaque to the incoming waves. If the window is 34.5 cm wide, what is the distance from the central maximum to the first-order minimum along a wal..
an air-track glider attached to a spring oscillates between the 10 cm mark and the 60 cm mark on the track. the glider
Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold by a mass of 3.245 g, is pressed into a leaf of 3.989 m thickness, what is the area of the..
A converging lens (f1 = 24.0 cm) is located 56.0 cm to the left of a diverging lens (f2 = ?28.0 cm). How far is the object from the converging lens
question1the relatively high resistivity of dry skin about can safely limit the flow of current into deeper tissues of
a string is wrap[ed tightly around the circumference of a wheel with a mass of 1.23 kg and a radius of 0.324m. what is the moment of inertia of the wheel
Three charges Q, Q, and -Q are located at the corners of an equilateral triangle, as depicted in the figure. They all have magnitude Q = 3.13 μC. What is the force on charge Q at the top of the triangle?
An electron and a positron each have a mass of9.11 10-31 kg. They collide and both vanish, with onlyelectromagnetic radiation appearing after the collision. determine the energy of the electro magnetic radiation
A solid sphere with a radius of 75 mm rolls (without slipping#) down from rest along an inclined plane that is 5 m long. What angle does the plane make with the horizontal
Given that the weight of dry sandstone sample in air is 20.0g, the weight of saturated sample in air is 22.5g, What is the bulk volume of this sample and what is its porosity
The magnetic force per meter on a wire is measured to be only 21% of its maximum possible value
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