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The GPS network consists of 24 satellites, each of which makes two orbits around the earth per day. Each satellite transmits a 50.0-W (or even less) sinusoidal electromagnetic signal at two frequencies, one of which is 1575.42 MHz. Assume that a satellite transmits half of its power at each frequency and that the waves travel uniformly in a downward hemisphere.
(a) What average intensity does a GPS receiver on the ground, directly below the satellite, receive? (Hint: First use Newton's laws to find the altitude of the satellite.)
(b) What are the amplitudes of the electric and magnetic fields at the GPS receiver in part (a), and how long does it take the signal to reach the receiver?
(c) If the receiver is a square panel 1.50 cm on a side that absorbs all of the beam, what average pressure does the signal exert on it?
(d) What wavelength must the receiver be tuned to?
What key considerations are involved in setting up a computer network for an integrated health care system and how do integrated systems affect the installation of networks.
A train is approaching a signal tower at a speed of 40 m/s. The train engineer sounds the 1000-Hz whistle. What is the frequency of the train whistle tone that is heard by the switchman?
A car traveling east and a minivan traveling south collide in a completely inelastic collision at a perpendicular intersection. what is the speed of the vehicles immediately after collision
A light source, S, is located 2.60m below the surface of a swimming pool and 1.30m from one edge of the pool. The pool is filled to the top with water.
Identify the action-reaction pairs of forces for the following situations. You step off a curb. You pat your tutor on the back. A wave hits a rocky shore.
A generator has a square coil consisting of 320 turns. The coil rotates at 67 rad/s in a 0.34 T magnetic field. What is the length of one side of the coil
distance possible between a real object and its real image through a thin convex lens
A 1.0-cm-diameter microscope objective has a focal length of 2.8mm. What is the resolving power of the objective if it is used in an oil-immersion microscope with noil= 1.45
Assume that the reservoir is 200m deep, held back by the dam wall . A small horizontal pipe at the base of the dam transfers water to the generator hall, where it gushes out at high speed and is used to turn the turbines that generate electricity. Wh..
You see the boy next door trying to push a crate down the sidewalk. He can barely keep it moving, and his feet occasionally slip. Estimate the mass of the crate
When a ceiling fan rotating with an angular speed of 1.70 rad/s is turned off, a frictional torque of 0.263 N·m slows it to a stop in 5.15 s. What is the moment of inertia of the fan?
question1a certain elevator cab in a new york hotel has a total run of 178 m. its greatest speed is 251 mmin. its
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