Question

question 1
temperature is:
what is measured with a thermometer
measured only in fahrenheit
how cold or hot you feel
measured with thermometers that have reference points that change with the geographic region that uses them.

question 2
the second law of thermodynamics states that the entropy of the universe is always decreasing.
true
false

question 3
in the scientific explanation of work being done, a force must be exerted and there must be motion or displacement in the direction of the force.
true
false

Explanation:

Analyze the definition of temperature

Temperature is operationally defined as the quantity measured by a thermometer. It is a macroscopic measure of the average kinetic energy of the particles in a system. It is not measured only in Fahrenheit (Celsius and Kelvin are also standard), nor is it defined purely by subjective human sensation (how hot or cold you feel). Thermometer reference points (like the freezing and boiling points of water) do not change with geographic regions.

Analyze the Second Law of Thermodynamics

The Second Law of Thermodynamics states that the total entropy of an isolated system (such as the universe) always increases over time, or remains constant in ideal reversible processes. It never decreases. Therefore, the statement that the entropy of the universe is always decreasing is false.

Analyze the scientific definition of work

In physics, mechanical work is done when a force acts on an object and causes a displacement of that object in the direction of the force. The formula is \(W = F \cdot d \cdot \cos(\theta)\). If there is no displacement, or if the displacement is perpendicular to the force, no work is done. Thus, the statement is true.

Answer:

Question 1

• what is measured with a thermometer (Correct answer)
• measured only in Fahrenheit
• how cold or hot you feel
• measured with thermometers that have reference points that change with the geographic region that uses them.

Question 2

• True
• False (Correct answer)

Question 3

• True (Correct answer)
• False