Well, it happens a few weeks ahead, then for a total of 3 hours and 40 minutes.
Answer: A. Work is done on the system and heat is transferred from the system for a net decrease in internal energy.
Explanation:
A refrigerator is a device which dispenses heat from the close system to a warmer area or in the surrounding. By dispensing the heat the internal temperature of the refrigerator drops. The system of refrigerator violates the second law of thermodynamics. As it performs the work to cool the region instead of heating the region. The work is done on the system and the internal energy decreases and the heat energy is liberated to the surrounding area. A refrigerator is an open system.
It's Photoelectric Effect, I just a test with this same question. I am not good for explaining exactly how, but I was right.
Answer:
<h3>t = 100secs</h3>
Explanation:
The following data
Distance x = 17km = 17000m
Speed v = 340m/s
Using the formula to get the time;
2x = vt
t = 2x/v
t = 2(17000)/340
t = 34000/340
t = 100secs
<em>Hence it takes 100seconds for the sound to reach your ears</em>
They exhibit identical behaviors with regard to changes of phase.
If there is any difference, it is too small to be measured, and none
has been observed.
