Author Question: State the First Law of Thermodynamics. What will be an ideal ... (Read 62 times)

Yi-Chen · **on:** Jul 29, 2018

State the First Law of Thermodynamics.

What will be an ideal response?

Question 2

Marie pushes horizontally on her desk, but not hard enough to get it moving. The friction force acting on the desk is

A) zero.
B) equal to the weight of the desk.
C) equal and opposite to her push.
D) none of the above

mariahkathleeen · **Reply #1 on:** Jul 29, 2018

Answer to Question 1

If U is the internal energy of an object, Q is the heat added to it, and W is the work done by the object, the first law of thermodynamics can be written as follows:
U = Q - W.

Answer to Question 2

Answer: C