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umka21 [38]
3 years ago
9

If I push on a wall with a force of 3500 N for 5 hours but the wall does not move, how much work have I done.

Physics
1 answer:
omeli [17]3 years ago
6 0
#1). Work = (force) x (distance)
Since the distance is zero, the work is zero.

#2).  But I've still gotta hand it to you in a big way.
There aren't many men who can push on a wall for 5 hours
with a force of nearly 790 pounds ! !   Work or no work.
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Q_T=63313.5\ J

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<em>Assuming that no heat is lost in the surrounding.</em>

<u>We know:</u>

Q=m.c.\Delta T

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Q_T=Q_{Lv}+Q_w ..............................(1)

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Q_{Lv}= latent heat given out by vapour to form water of 100°C

Q_w= heat given by water of 100°C to come at 34°C.

putting respective values in eq. (1)

Q_T=m(L+c.\Delta T)

Q_T=25(2256+4.19\times 66)

Q_T=63313.5\ J

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