1. Which term describes the ability of a muscle to return to its original length and shape after being stretched or contracted?

A. Contractility
B. Elasticity
C. Extensibility
D. Excitability

Correct answer: b

Rationale: The correct answer is B: "Elasticity." Elasticity is the term that describes the ability of a muscle to return to its original length and shape after being stretched or contracted. Contractility refers to the muscle's ability to contract forcefully, extensibility is the ability of a muscle to be stretched without being damaged, and excitability is the ability of a muscle to respond to stimuli. In this context, elasticity specifically pertains to the muscle's ability to bounce back to its original form, making it the most appropriate term in relation to the question.

2. Which word is most closely associated with the adjective "ambiguous"?

A. Precise
B. Vague
C. Definite
D. Straightforward

Correct answer: B

Rationale: "Ambiguous" implies uncertainty or multiple interpretations, making "vague" its closest synonym.

3. Which of the following is a unit of power?

A. Newton-meter (NÂ·m)
B. Joule (J)
C. Watt (W)
D. Kilogram (kg)

Correct answer: c

Rationale: Watt is the unit of power, measuring the rate of work done or energy transfer.

4. What happens to the speed of a sound wave when it travels from air to water?

A. It increases because water is denser.
B. It decreases because water is denser.
C. It remains the same.
D. Speed depends on the frequency, not the medium.

Correct answer: A

Rationale: Sound waves travel faster in denser mediums like water compared to air due to stronger interactions between particles.

5. What is the unit of measurement for density?

A. Grams per liter (g/L)
B. Kilograms per cubic meter (kg/m³)
C. Pounds per square inch (psi)
D. Newtons per meter (N/m)

Correct answer: A

Rationale: Density is defined as mass per unit volume. The most commonly used unit for density in the metric system is grams per liter (g/L). Kilograms per cubic meter (kg/m³) is also a common unit for density, but grams per liter is more frequently used in everyday measurements. Pounds per square inch (psi) is a unit of pressure, not density. Newtons per meter (N/m) is a unit of force per unit length, not density.