Answer:
true
Explanation:
this is fair to other people
The answer is b. Velocity
I believe its b. degree Celsius <span />
Answer:
The final temperature is 79.16°C.
Explanation:
Given that,
Heat 
Temperature = 20.0°C
Entropy = 465 J/k
We need to calculate the average temperature
Using relation between entropy and heat
Where, T = average temperature
= transfer heat
= entropy
Put the value into the formula
We need to calculate the final temperature
Using formula of average temperature
....(I)
Put the value in the equation (I)
We convert the temperature K to degrees
Hence, The final temperature is 79.16°C.
Answer:
Work must be done on the system
Explanation:
The 2nd law of thermodynamics states that the entropy of an isolated system can never decrease over time. A direct consequence of this law is that thermal energy (heat) can spontaneously flow only from hotter objects to colder objects, but never in the opposite direction. In fact, when two objects at different temperatures are put in contact, the hotter one transfers heat to the colder one: in this way, the entropy of the system increases (because the heat is 'spread' over the two objects). The opposite process would violate the 2nd law of thermodynamics.
The only way to transfer heat from a colder object to a hotter objects is by doing external work on the system. This is essentially what is done in a refrigerator: by doing external work, the refrigerator transfers heat from a colder environment (the interior of the fridge) to a hotter environment (the surrounding).
