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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This question involves the concepts of Wein's displacement law and characteristic wavelength.
The blackbody temperature will be "3.22 x 10⁵ k".
<h3>WEIN'S DISPLACEMENT LAW</h3>According to Wein's displacement law,
where,
= characteristic wavelength = 9 μm = 9 x 10⁻⁹ m
- T = temperature = ?
- c = Wein's displacment constant = 2.897 x 10⁻³ m.k
Therefore,
T = 3.22 x 10⁵ k
Learn more about characteristic wavelength here:
Answer:
Explanation:
Given that,
Initial velocity of an object, u = 22 m/s
Final velocity of an object, v = 36 m/s
Time, t = 5 s
It can be assumed to find the average acceleration of the object instead of average velocity.
The change in velocity per unit time is equal to average acceleration of an object. It can be given by :
So, the acceleration of the object is .