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JulijaS [17]
3 years ago
8

Given that A+B=C and C is perpendicular to A. Further if |A|-|C|, then what is the angle.(note that this are vector)

Physics
1 answer:
AleksandrR [38]3 years ago
3 0

Answer:

Explanation:

I do not see any possible way to add two vectors and have the result be perpendicular to one of the addends.

Are you sure the question is posed correctly?

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Suppose astronomers find an earthlike planet that is twice the size of Earth (that is, its radius is twice the radius of Earth).
JulijaS [17]

Answer:

4 times the mass of Earth

Explanation:

M_1 = Mass of Earth

M_2 = Mass of the other planet

r = Radius of Earth

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The force of gravity on an object on Earth is

F=\frac{GM_1m}{r^2}

The force of gravity on an object on the other planet is

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As the forces are equal

\frac{GM_1m}{r^2}=\frac{GM_2m}{(2r)^2}\\\Rightarrow M_1=\frac{M_2}{4}\\\Rightarrow M_2=4M_1

So, the other planet would have 4 times the mass of Earth

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