Answer:
The value is
Explanation:
From the question we are told that
The speed at which galaxy B moves away from galaxy A is
Here c is the speed of light with value
The speed at which galaxy C moves away from galaxy B is
Generally from the equation of relative speed we have that
Here p is the velocity at which galaxy C recede from galaxy A so
=>
=>
=>
=>
=>
Momentum = (mass) x (speed)
Divide each side by (speed): Mass = (momentum) / speed
Mass = (45,000 kg-m/s) / (30 m/s) =
1,500 kg .
centripetal acceleration is given by formula
given that
now we have
so the ratationa frequency is given by
<u>Answer:</u>
<em>The chemical reactions involves changes in energy due to the changes in the breaking and building of bonds.</em>
<u>Explanation:</u>
The changes in energy that chemical reactions involves are:
- <em>Endothermic(absorbing) chemical reactions.</em>
- <em>Exothermic(releasing) chemical reactions. </em>
Endothermic: The chemical reactions which absorbs the energy those chemical reactions are called endothermic chemical reactions.
Exothermic: The chemical reactions which releases the energy those chemical reactions are called exothermic chemical reactions.
The similarity in the reactions is both reactions are related to the change in energy. In one reaction the energy is absorbing and in another reaction the energy is releasing.