What is true about energy that is added to a closed system?
2 answers:
Answer:
B. It does work or increases thermal energy.
Explanation:
As we know by first law of thermodynamics that
now we have
so internal energy is based on the change in temperature of the gas
Q = heat given to the system
W = work done by the gas
now we know that when heat is given to the system then by energy conservation work some of its heat is used to increase the temperature of gas as its internal energy and other part of heat is used to do some work.
so correct answer will be
B. It does work or increases thermal energy.
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Answer:
K = 1.29eV
Explanation:
In order to calculate the kinetic energy of the proton you first take into account the uncertainty principle, which is given by:
(1)
Δx : uncertainty of position = 2.0pm = 2.0*10^-12m
Δp: uncertainty of momentum = ?
h: Planck's constant = 6.626*10^-34 J.s
You calculate the minimum possible value of Δp from the equation (1):
The minimum kinetic energy is calculated by using the following formula:
(2)
m: mass of the proton = 1.67*10^{-27}kg
in eV you have:
The kinetic energy of the proton is 1.29eV