Answer:
Satellites can gather weather data from much higher altitudes than land-based instruments can.
Answer: <u>To establish a point from which to measure a future distance, or if movement has occurred.</u>
Explanation:
A reference point is a point with respect to which one comes to know whether any movement has occurred or not. A still point is required. When the object changes distance from that point, it means that object has moved. The distance can be calculated from one point to another.
Therefore, A reference point is used to establish a point from which future distance or if movement has occurred is detected.
Answer:
angular speed ω = 2PI / T rad/sec
ω^2*r = M*G/r^2
r = ³√ M*G/ω^2 = ³√6.42*10^23*6.67*10^-11*88640^2/39.5 = 2.04*10^7 m
Explanation:
Answer: Varying amounts of the Moon's lit surface being visible from Earth.
Explanation:
Phases of the moon can be defined as the different shapes of the moon visible from the Earth. This happens because sun lits up the face of moon and due to different position of moon in the orbit around earth, varying portion of the lit surface of the moon is visible from Earth. Refer to the diagram below:
