How much thermal energy is Generated?
2 answers:
Answer:
1000 J of thermal energy is generated.
Explanation:
The attached figure shows the whole scenario. It consists of three types of energies i.e. Gravitational Potential Energy, Kinetic Energy and thermal energy.
We know that the energy of a system remains conserved. In this case, the gravitational potential energy is the sum of kinetic energy and the thermal energy.
GPE = KE +TE
8000 J = 7000 J + TE
TE = 1000 J
So, the thermal energy is 1000 J. Hence, this is the required solution.
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Answer: The original temperature was
Explanation:
Let's put the information in mathematical form:
If we consider the helium as an ideal gas, we can use the Ideal Gas Law:
were <em>R</em> is the gas constant. And <em>n</em> is the number of moles (which we don't know yet)
From this, taking , we have:
⇒
Now:
⇒