A dog of mass 4 kg runs up a hill of height 8 m. How much gravitational potential energy does the dog gain?
2 answers:
Answer:
The gravitational potential energy is 314 J.
(A) is correct option.
Explanation:
Given that,
Mass of dog = 4 kg
Height = 8 m
We need to calculate the potential energy
Using formula of potential energy
m = mass
g = acceleration due to gravity
h = height
Put the value into the formula
Hence, The gravitational potential energy is 314 J.
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Answer: high temperature and low pressure
Explanation:
The Ideal Gas equation is:
Where:
is the pressure of the gas
is the volume of the gas
the number of moles of gas
is the gas constant
is the absolute temperature of the gas in Kelvin
According to this law, molecules in gaseous state do not exert any force among them (attraction or repulsion) and the volume of these molecules is small, therefore negligible in comparison with the volume of the container that contains them.
Now, real gases can behave approximately to an ideal gas, under the conditions described above and taking into account the following:
When <u>temperature is high</u> a real gas approximates to ideal gas, because the molecules move quickly, preventing the repulsion or attraction forces to take effect. In addition, at <u>low pressures</u>, the volume of molecules is negligible.