Coal plants use a boiler to produce steam.
Generally speaking, negative ions increase the flow of oxygen to the brain resulting in higher alertness, decreased drowsiness, and more mental energy.
The heat transferred is -30J
When the gas undergoes compression, work is done on the gas and its internal energy increases.
According to the first law of thermodynamics, the increase in internal energyΔU is the sum of the heat given to the gas ΔQ and the amount of work done on the gas ΔW
The work done on the gas is 150 J due to compression and the internal energy of the gas increases by 120 J.
Therefore, the heat given to the gas is given by,
Thus, an amount of heat equal to 30 J flows out of the system.
Answer:
Height of the building = 35.78 m
Explanation:
Given that,
The time period of a pendulum is, T = 12 s
We need to find the height of the building. The formula for the time period of a pendulum is given by :
Where
l is the height of the building
So, the height of the building is 35.78 m.
Heating the gas in an air balloon makes the balloon rise<span> because the </span>gas<span> in the</span>balloon<span> becomes lighter than natural </span>air<span>. The </span>heated gas<span> has less mass per unit of volume than that of the cool </span>air<span> surrounding the </span>balloon<span>. Hope this answers the question.</span>