Discuss the influence of the relative masses and distance between the two objects on tide-generating forces
What will be an ideal response?
The gravitational force is derived from Newton's law of universal gravitation, which states that every object that has mass in the universe is attracted to every other object. An object can be as small as a sub-atomic particle or as large as a sun. The basic equation for this relationship is
Fg = Gm1m2 / r2
This equation states that the gravitational force (Fg) is directly proportional to the product of the masses of the two bodies (m1, m2 ) and is inversely proportional to the square of the distance between the two masses (r2). G is the gravitational constant, which does not change.
If mass increases, then gravitational force increases.
If distance increases, then gravitational force greatly decreases by the square of distance, so even a small increase in the distance between two objects significantly decreases the gravitational force between them.
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Fill in the blank(s) with the appropriate word(s).
A trellis drainage is a tree branchlike pattern of streams. Indicate whether the statement is true or false
How do we define the length of a year on Earth?
A. A year is related to the revolution of the Sun around Earth. B. A year is related to the rotation of the Sun on its axis. C. A year is related to the revolution of Earth around the Sun. D. A year is related to the rotation of Earth on its axis.
Warming temperatures have accelerated the thawing of Gelisols. This efffect is of particular concern because
A) Gelisols contain about half of the pool of global carbon in the form of frozen carbon dioxide and methane and their release into the atmosphere could further affect warming climate. B) Gelisols are an important soils for growing speciality cold weather crops. The thawing of the Gelisols will adversely impact this lucrative market. C) Gelisols are the youngest, least developed soils on the planet. Warming will further stifle the horizontal development of these soils. D) as the permafrost melts, the meltwater will runoff, further contributing to global sea-level rise.