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B) The 4 terrestrial planets have to as soon as were hot sufficient to be molten (like a liquid).
Terrestrial planets may be described as any planet of the sun machine or any exoplanet that is "Earth-like" in the experience that it is composed primarily of metals and rock, in evaluation to a planet that's a fuel large.
In the sun machine, the terrestrial planets are the inner planets closest to the solar, i.e. Mercury, Venus, Earth, and Mars.
Scientists believe that the densest, heaviest substances are at the center and not evenly allotted can be due to the truth that they need to once be warm enough to be molten. In this example, density will take region, making the heavier below and the lighter on the pinnacle.
In the four terrestrial planets, the densest, heaviest materials are at the center and not evenly distributed throughout the planet. Scientists interpret this observation to mean that:
a.the four terrestrial planets must once have been inside the Sun
b.the four terrestrial planets must once have been hot enough to be molten (like a liquid)
c.the four terrestrial planets must have formed where Jupiter and Saturn now are
d.the four terrestrial planets must have collided with each other many times
e.none of the above
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(1)
is the spring constant and 
is the compression of the spring. If we substitute the numbers, we find:
