« previous next »

Author Question: State the First Law of Thermodynamics. What will be an ideal ... (Read 15 times)

Yi-Chen

  • Hero Member
  • *****
  • Posts: 550
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

  • Sr. Member
  • ****
  • Posts: 337
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


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Yi-Chen

  • Hero Member
  • *****
  • Posts: 550
Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


mariahkathleeen

  • Sr. Member
  • ****
  • Posts: 337
Reply #3 on: Jul 29, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

Did you know?

Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

Human infants are like all other placental mammals, except they are born at a less developed state. Human infants are like all other placental mammals, except they are born at a less developed state.
Federal vs state law Federal vs state law
Collapse of State Trooper Cave’s Roof Collapse of State Trooper Cave’s Roof
Cultures Ideal Body Types Cultures Ideal Body Types
Fixed bed state (i) and complete fluidization (ii) Fixed bed state (i) and complete fluidization (ii)
Sketch the graph of each function using transformations. State the domain and range. Sketch the graph of each function using transformations. State the domain and range.
Video: Mitosis step-by-step

For a complete list of videos, visit our video library