Author Question: Distinguish between ac and dc. When you plug a light bulb into a wall outlet, where is the source of ... (Read 21 times)

PhilipSeeMore · **on:** Jul 29, 2018

Distinguish between ac and dc. When you plug a light bulb into a wall outlet, where is the source of electrons?

What will be an ideal response?

Question 2

A sealed 26- m3 tank is filled with 2000 moles of oxygen gas (O2 ) at an initial temperature of 270 K. The gas is heated to a final temperature of 460 K.

The ATOMIC mass of oxygen is 16.0 g/mol, and the ideal gas constant is R = 8.314 J/mol K = 0.0821 L atm/mol K. The final pressure of the gas is closest to
A) 0.29 MPa.
B) 0.31 MPa.
C) 0.33 MPa.
D) 0.34 MPa.
E) 0.36 MPa.

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

Answer to Question 1

Answer: AC is alternating current, where electrons do not migrate but simply alternate about relatively fixed positions. In dc, the flow of electrons is in one direction only. Migration does occur, but the source of electrons, whether in a dc or ac circuit, is the electric conductor itself. You can buy a water pipe in a hardware store with no water inside, but you can't buy an electron pipe without its supply of electrons. Wires and all materials have electrons in them.

Answer to Question 2

A