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1). 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 Earth's atmosphere? Assume the distance to the Moon is precisely 3.84×108m and 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.
2) An object is located in air 30 cm from the vertex of a concave surface made of glass with a radius of curvature 10 cm. Where does the image by refraction form and what is its magnification? Use nair=1 and nglass=1.5.
A ball is launched from a tabletop with a velocity of 13.4 m/s at an angle of 64 degrees above horizontal. What is its speed when it strikes the floor
A fan rotating at 20 rpm slows down by a constant acceleration and comes to a stop in a time of 4.7 s. What is its angular displacement in this time? Give your answer in radians, do not enter units.
A copper kettle contains water at 20.0 °C. When the water is heated to 91.9 °C, the volume of the kettle expands with 1.26 x 10 -5 m 3. Decide the volume of the kettle at 20.0 °C.
A small object of mass 2.90 g and charge -17 µC "floats" in a uniform electric field. What is the magnitude and direction of the electric field
A 2kg mass is loaded into a spring cannon. The cannons spring has a constant k=4000N/m and the spring is compressed 0.8m. The mass is initially at rest. what is the initial velocity of the mass
The three circuits below have driving Emf's with the same amplitude, 5 V. Each is driven at a fixed frequency which differs from the other two. The magnitudes of the inductive reactance in the left circuit, of the capacitive reactance in the cente..
Using the ideal gas law, determine the volume of gas produced when the pressure is 1.00 atmosphere and the temperature is 33.0°C.
After working really hard on a hot day a third tuning fork is used with a frequency of 1053 Hz, and the distance between the 1st and 3rd standing wave created is 33.0 cm, what is the temperature of the air in this pipe
A current-carrying wire of length 0.5m is at the Equator. Assuming that the magnetic field of the Earth has magnitude of 5 x 10^-5 T, what current is required to allow the wire to be suspended
After the collision, the 200 g puck has a velocity of 1.00 m/s [w53'n). Calculate the velocity of the 300 g puck.
Objects A and B are both positively charged. Both have a mass of 138 g, but A has twice the charge of B. How large is the electric force (in N) on A
At one point in a pipeline, water's speed is 3.30 m/s and the gauge pressure is 4.00×10^4 Pa. Find out the gauge pressure at a second point in the line 13.0 m lower than the first if the pipe diameter at the second point is twice that at the first.
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