The gas releases an amount of heat equal to -225 J
Explanation:
The change in internal energy of a diatomic gas is given by:
where
n is the number of moles
R is the gas constant
is the change in temperature
For this gas we have:
n = 0.235 mol
So, the change in internal energy of the gas is
Now we can use the 1st law of thermodynamics to find the heat absorbed/released by the gas:
where
Q is the heat absorbed by the gas
W is the work done by the gas
Here we have:
Solving for Q, we find:
Where the negative sign means the heat has been released by the gas.
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the pitch which you hear will be greater than 300 Hz since the sound source is approaching you. But once stopped, the pitch will be 300 Hz exactly. So the pitch must be gradually decreasing from above 300 Hz to 300 Hz during the slowing down process.
Answer:
1. and 2. If the buoyant force is greater than the object's weight, the object rises to the surface and floats. If the buoyant force is less than the object's weight, the object sinks. If the buoyant force equals the object's weight, the object can remain suspended at its present depth.
3. When the buoyant force equals one ton, it will sink no further. When any boat displaces a weight of water equal to its own weight, it floats. This is often called the “principle of flotation” where a floating object displaces a weight of fluid equal to its own weight.
Explanation:
Can anyone help me with my history question.
Answer:
I think first one
Explanation:
Because his first law of motion was every object will remain at rest or uniform motion in a straight line