Suppose the mass of the Earth were tripled, but it kept the same density and spherical shape. How would the weight of objects at the Earth's surface change?
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Ответ:
Explanation:
Assume the earth is a sphere
Tripling the mass at the same density will triple the volume.
If R is earth radius
V = (4/3)πR³
3V = (4/3)πR₁³
3(4/3)πR³ = (4/3)πR₁³
3R³ = R₁³
(∛3)R = R₁
Gravity on earth is
g = GM/R²
Gravity on the new planet is
g₁ = GM₁/R₁²
g₁ = G(3M)/((∛3)R)²
g₁ = 3/(∛3)²GM/R²
g₁ = 3/(∛3)²g
so the weight of objects will be about 1.44 times greater
Ответ:
Your answer is A) 3.33ft/min E
Explanation:
i know this because i know to find the velocity you have to divide distance and time. So for this question your distance=10 and your time=3.