In a moving car the outside looks to be moving. however if viewed from the outside, the car appears to be moving. so motion is relative to the person observing.
Answer:
Final temperature of the mixture becomes

Explanation:
Here we know that heat given by the nail is equal to the heat absorbed by water
So here we know that heat to change the temperature is given as

so by equating the heat we have

now we have




Answer:
D
Explanation:
The CV system does all of the above