The heat taken to do the 10,000 J of work is 4081 J
<u>Explanation:</u>
The ratio of the temperature difference between the reservoirs and the temperature of the hot reservoir is termed as maximum thermal efficiency.
Maximum thermal efficiency is
1 - (Tc / Th).
where Tc represents the absolute temperature of the cold reservoir
Th represents the absolute temperature of the hot reservoir.
1 - (293/495) = 0.408
If the input is 10,000 J, then 4081 J is used to do work. The remaining 5919 J is rejected as heat into the air.
Answer:
mass=56.12kg
Explanation:
PE=mgh
4620=m×9.8×8.4
make m subject of the formula...
m =4620/(9.8×8.4)
m=4620/82.32
m=56.12kg
Answer:
Enlarged [Size]
Virtual and Erect [Nature]
On the same side of the lens as the object [Position]
Explanation:
The answer is , n<span>o, because there are not the same number of molecules in the product side as in the reactant side.
The law of conservation of matter says that the system remains the same throughout. The number of atoms, mass and energy must stay constant. If you look at your figure there are more white atoms on the left side than the right, this means that there was a loss and this should not be the case.
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Relatively hot objects emit visible light.
Some examples:
==> the wire coils in the toaster;
==> the spoon that you stuck in the flame on the stove;
==> the fine wire in the lightbulb when current goes through it.
VERY radioactive objects also do that. But if you're actually
standing there watching an object that's THAT radioactive,
then you're in big trouble.
