Write the differences between displacement current and conducting current by properly drawing the figures. We know: It is possible to express the conducting current by the surface integration of conducting current density.

Question: When to use the closed surface integral and when to use the open surface integral for such calculations of conducting current?

Hints: Conducting current can be considered as a type of flux. From the point of view of flux calculation, try to explain the matter by drawing proper figures.

A quantity of 2.00 g of calcium carbide is reacted at 500.0 K with excess of liquid water in a closed container fitted with a piston. The only two products of this reaction are ethyne and calcium hydroxide calculate the work done by the production of C2H2 gas against an external pressure assume the reaction proceeds until the pressure of the gas produced equals the external pressure (atmospheric pressure). Assume that the reaction proceeds until the pressure of the gas produced equals the external pressure.

Assume that growing levels of Chinese debt, a trade war with the U.S., and uncertainties surrounding the COVID-19 virus are lowering MPK in China. What will be the effect on Chinese domestic investment, I? For each of the following three cases, derive the expected effects on Chinese and US interest rates, saving, investment, and net exports:

(a) China is a closed economy;

(b) China is a small open economy;

(c) the world consists of two large economies: China and the US.

Three 1.0-L flasks, maintained at 308 K, are connected to each other with stopcocks. Initially the stopcocks are closed. One of the flasks contains 1.9 atm of N2, the second 2.8 g of H2O, and the third, 0.70 g of ethanol, C2H6O. The vapor pressure of H2O at 308 K is 42 mmHgand that of ethanol is 102 mmHg. The stopcocks are then opened and the contents mix freely. What is the Pressure? Express your answer to two significant figures.

Which of the following statements regarding sales returns and allowances is not true?

Group of answer choices

A reduction in the selling price because of damaged merchandise is included in sales returns and allowances.

Sales returns and allowances do not have an impact on gross profit.

Sales returns and allowances are closed to the Income Summary account.

Sales returns and allowances are rarely disclosed in published financial statements.

Sales returns and allowances are recorded in a separate contra-revenue account.

Two circular loops are lying side-by-side horizontally on the surface of a table. A battery and switch are connected in series with the left-hand loop. When the switch is closed, a counterclockwise current begins to flow in the left-hand loop. What, if anything, happens in the right-hand loop due to the current flowing in the left-hand loop?

a) The current remains zero.

b) A counterclockwise current is induced.

c) A clockwise current is induced.

Explain your answer.

Which of the following statements are correct?

a) If A is a bounded subset of the real line, every infinite subset of A has a limit point.

b) If A is a bounded subset of the real line, every open cover of A has a finite subcover.

c) If A is an infinite open subset of the real line, there is an infinite open cover with a finite subcover.

d) If A is a closed subset of the real line, every open cover of A has a finite subcover.

Just chose the correct answer choice.