If two students push a box with a force of 3N in the same direction, and there is no other unbalanced force on the box, what is
2 answers:
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Explanation:
As per the problem,
When q > 0 then -q is a negative charge . Since, change in potential energy () increases.
or, > 0
or,
Therefore, both positive and negative charge will move from to
and as
so both of them move through a negative potential difference.
Thus, we can conclude that the true statements are as follows.
- The positively charged object moves through a negative potential difference between A and B (that is, VB - VA < 0).
- The negatively charged object moves through a negative potential difference between A and B (that is, VB - VA < 0).
Answer:
(A) 140 j/sec (b) 1.26 K
Explanation:
We have given the heat heat flowing into the refrigerator = 40 J/sec
Work done = 40 W
(a) So the heat discharged from the refrigerator
(b) Total heat absorbed =140 j/sec
Let the temperature be
Heat absorbed per hour =504000
So