I believe the answer is option C 1.8 kg•m/s to the east
The time period of the communications satellites must be 24 hours to make one complete orbit around the earth.
An object that has been placed into orbit in space on purpose is known as a satellite or artificial satellite. Most spacecraft, with the exception of passive satellites, contain a means of generating electricity for the electronics they carry, such as solar cells or radioisotope thermoelectric generators.
A communications satellite is a man-made spacecraft that uses a transponder to relay and amplify radio telecommunication signals. It establishes a channel of communication between a source transmitter and a receiver situated at various points on Earth.
Most satellites that orbit the Earth do so between 160 and 2,000 kilometers above the surface. Because of how closely the satellites are orbiting the Earth, this orbital regime is known as low Earth orbit or LEO. The normal orbital period for satellites in low Earth orbit (LEO) is between 90 and 2 hours.
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<span>Contour lines on a topographic map show elevation of the ground. Contour lines on a map that are constructed by connecting points of equal elevation .
</span><span>
</span><span>some general characteristics of contour lines:
</span><span>1) They do not cross each other, split or divide.
</span><span>2) Steep slopes are reprented by contour lines spaced closely. Gentle slopes are reprented by contour lines spaced far apart
</span><span>3) Contour lines trend up valleys and form a "V" or a "U" where they cross a stream.</span>
Answer:
Explanation:
The frequency of a sodium vapor lamp, 
We need to find the wavelength of light. The relation between wavelength, frequency and speed of light is given by :
So, the wavelength of light is equal to 
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