Q. In the context of biomechanics, what does the term 'force' refer to?
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A.
A push or pull on an object
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B.
The weight of an object
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C.
The pressure exerted by fluids
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D.
The energy transferred to an object
Solution
In biomechanics, 'force' refers to a push or pull on an object that can cause it to accelerate.
Correct Answer:
A
— A push or pull on an object
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Q. What happens to the pressure in a closed container if the temperature of the gas inside is increased?
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A.
Pressure decreases
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B.
Pressure remains constant
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C.
Pressure increases
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D.
Pressure fluctuates
Solution
According to Gay-Lussac's Law, if the temperature of a gas in a closed container increases, the pressure also increases.
Correct Answer:
C
— Pressure increases
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Q. What is the effect of increased pressure on the solubility of gases in liquids?
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A.
Increases solubility
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B.
Decreases solubility
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C.
No effect
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D.
Varies by gas type
Solution
Increased pressure generally increases the solubility of gases in liquids, as described by Henry's Law.
Correct Answer:
A
— Increases solubility
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Q. What is the pressure exerted by a 10 kg weight resting on a 2 m² area?
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A.
5 Pa
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B.
10 Pa
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C.
50 Pa
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D.
100 Pa
Solution
Pressure is calculated as force (weight) divided by area. Here, pressure = (10 kg * 9.81 m/s²) / 2 m² = 49.05 Pa, approximately 50 Pa.
Correct Answer:
C
— 50 Pa
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Q. What is the primary force that helps blood circulate through the body?
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A.
Gravity
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B.
Friction
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C.
Cardiac force
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D.
Inertia
Solution
The primary force that helps blood circulate through the body is the cardiac force generated by the heart.
Correct Answer:
C
— Cardiac force
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Q. What is the unit of pressure in the International System of Units (SI)?
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A.
Pascal
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B.
Newton
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C.
Bar
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D.
Atmosphere
Solution
The SI unit of pressure is the Pascal (Pa), which is defined as one newton per square meter.
Correct Answer:
A
— Pascal
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Q. Which of the following best describes hydrostatic pressure?
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A.
Pressure exerted by a fluid at rest
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B.
Pressure due to fluid motion
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C.
Pressure in a gas
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D.
Pressure in a vacuum
Solution
Hydrostatic pressure is the pressure exerted by a fluid at rest, typically due to the weight of the fluid above.
Correct Answer:
A
— Pressure exerted by a fluid at rest
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Q. Which of the following describes the relationship between pressure and volume in a gas, according to Boyle's Law?
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A.
Pressure increases as volume increases
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B.
Pressure decreases as volume decreases
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C.
Pressure is independent of volume
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D.
Pressure decreases as volume increases
Solution
According to Boyle's Law, pressure decreases as volume increases, provided the temperature remains constant.
Correct Answer:
D
— Pressure decreases as volume increases
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Q. Which of the following factors does NOT affect blood pressure?
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A.
Cardiac output
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B.
Blood volume
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C.
Blood viscosity
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D.
Skin temperature
Solution
Skin temperature does not directly affect blood pressure, while cardiac output, blood volume, and blood viscosity do.
Correct Answer:
D
— Skin temperature
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Q. Which of the following is a common clinical application of measuring pressure?
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A.
Determining heart rate
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B.
Assessing lung function
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C.
Monitoring blood pressure
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D.
Evaluating muscle strength
Solution
Monitoring blood pressure is a common clinical application of measuring pressure in healthcare.
Correct Answer:
C
— Monitoring blood pressure
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