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Circular apertures are often involved in the transmissio of EM waves over long distances. Discuss how this would affect communications to the moon from a circular radio antenna such as Morehead State's 21m diameter satellite tracking antenna operating at a radio wave frequency of 7139.5 MHz. What would happen to the signal beam and why might it matter? You may need to look up the distance to the moon. Please include some calculations in your discussion.
What is the stopping distance when the surface is dry and the coefficient of friction is 0.620.
Two packing crates of masses 10.0 kilogram and 5.00 kilogram are connected by a light string that passes over a frictionless pulley. Calculate the acceleration of the 5.00 kg crate and the tension in the string
A 1 m stick is used as a simple pendulum with a 2 kg weight on the end. What is its period of oscillation
A 4.8 m wire carries a current of 7.0A toward the +x direction. Find the magnitude of the magnetic field producing the force
A 0.5 kg ball is thrown straight up in the air with initial speed of 40 m/s. What is the maximum height reached by the ball
Assuming the cost of energy from the electric company is $0.115/kWh, compute the cost per day of operating a lamp that draws a current of 1.65 A from a 110-V line
A heater runs on an AC voltage of 120 V and draws a power of 44 W. If this heater were run instead on a DC voltage of 90 V, how much current would flow through the heater
An initially stationary 1.3 kg object accelerates horizontally and uniformly to a speed of 17 m/s in 3.0 s. What is the instantaneous power due to that force
The work needed to remove an electron from the surface of sodium is 2.3eV. Find the maximum wavelength of light
An open train car, with a mass of 2210 kg, coasts along a horizontal track at the speed 2.47 m/s. What is the car's speed after the loading is completed
A research submarine has a 30 centimeter diameter window that is 9 centimeter thick. Find the submarine maximum safe depth in salt water
if 61.5 l of oxygen at 18c and an absolute pressure of 2.45 atm are compressed to 48.8l and at the same time the
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