In communication satellite, multiple repeaters are known as?

a. detector

d. modulator

b. stations e. transponders

c. none of above

How high above Earth's surface does the troposphere reach

What provides the centripetal force needed to keep Earth in orbit? A. inertia B. its rotation on its axis C. the gravitational pull of the Sun D. the gravitational pull of the Moon

The invariable wave property in the Doppler effect is the:

Mrs. Perez added a room temperature copper cube and an aluminum cube she just removed from the freezer to a beaker of boiling water. She left thw cubes in the water for three hours.

A 15-µF capacitor is charged to 40 V and then connected across an initially uncharged 25-µF capacitor. What is the final potential difference across the 25-µF capacitor?

Your boss at the Cut-Rate Cuckoo Clock Company wants to save money on materials. You are asked to reduce the balance wheel, which is cylindrical, dimensions to one-third their original values.

Which of the following conditions is not necessary to observe an interference pattern between two sets of waves? A) The waves must have the same wavelength. B) The waves must have a constant phase difference.

Calculate the change in velocity of 70 kg object being pulled with 1000N force force 10 s

Which reaction obeys the law of conservation of mass?

Smaller bits of rock that pass through the atmosphere and slam into Earth's surface are called a. asteroids. b. meteors. c. meteorites. d. meteoroids.