<span>The sum of the protons and neutrons in an atom equals the mass number. </span>
Answer:
option A
Explanation:
renewable resources are replenishable that means they can't be depleted
Answer:
Low satellite has high orbital velocity
Explanation:
let v be the orbital speed of the satellite orbiting at a height h is given by

where, M be the mass of planet, r be the radius of planet and h be the height of planet from the surface of planet.
here we observe that more be the height lesser be the orbital velocity.
So, a satellite which is at low height has high orbital velocity.
Answer:

Explanation:
As we know that the resultant of two vectors is given as

here we know that



now we have



Answer:
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Explanation: