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Question 1

Question 1

Revolt · Accepted Answer

A: [Dropdown 1] entropy

Question 2

Dierdra began writing a summary of the relationship between the first and second laws of thermodynamics. Thermal energy in a system is conserved and can increase the system’s internal energy and/or be used to do work. Which best completes Dierdra’s summary?

Revolt · Accepted Answer

A: Thermal energy moves from warmer objects to cooler objects.

Question 3

Which statement describes the relationship between energy and entropy in the universe?

Revolt · Accepted Answer

D: Energy must be added to decrease entropy.

Question 4

Question 4

Revolt · Accepted Answer

A: [Dropdown 1] efficiency

Question 5

Rosa pours a cup of boiling water into a pot of room-temperature water. According to the second law of thermodynamics, what will occur?

Revolt · Accepted Answer

A: Thermal energy from the boiling water will flow to the room-temperature water until all of the water in the pot is at a single temperature.

Question 6

What is the formula for calculating the efficiency of a heat engine?

Revolt · Accepted Answer

B: mathrm cap e f f i c i e n c y is equal to the fraction with numerator cap t sub h minus cap t sub c and denominator cap t sub h times 100

Question 7

Which is the best example of increasing entropy?

Revolt · Accepted Answer

D: A deserted field becomes overgrown with weeds.

Question 8

The temperature of a heat engine is 500 cap k Some of the heat generated by the engine flows to the surroundings, which are at a temperature of 125 cap k

Revolt · Accepted Answer

75

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