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joannsrods
08.12.2020 •
Physics
Which best describes a force?
1. a vector with magnitude and direction.
2. a vector with speed and strength
3.a vector with direction only
4.a vector with strength only
Solved
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Ответ:
Therefore, a force has a magnitude and direction.
Ответ:
DU = 21 KJ
Explanation:
Given the following data;
Quantity of heat = 125 KJ
Work = 104 KJ
To find the change in internal energy;
Mathematically, the change in internal energy of a system is given by the formula;
DU = Q - W
Where;
DU is the change in internal energy.
Q is the quantity of energy.
W is the work done.
Substituting into the formula, we have;
DU = 125 - 104
DU = 21 KJ