Mantle convection<span> is the slow creeping motion of Earth's solid silicate </span>mantle<span> caused by </span>convection<span> currents carrying heat from the interior of the Earth to the surface.
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Answer:
B) Bb × Bb I think I can't promise that's right
Nuclear energy comes from nucleus of atoms which is released by nucleus fusion
Force=mass*acceleration
F=ma
20=2.8a
a=20/2.8
a=7.14 m/s^2