Choose the correct statements: (A) Weight of a substance is the amount of matter present in it. (B) Mass is the force exerted by gravity on an object. (C) Volume is the amount of space occupied by a substance. (D) Temperatures below 0°C are possible in Celsius scale, but in Kelvin scale negative temperature is not possible. (E) Precision refers to the closeness of various measurements for the same quantity.
Choose the correct answer from the options given below:
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Precision refers to the consistency of measurements, whereas accuracy refers to how close a measurement is to the true value.
To determine the correct statements, we need to analyze each given statement:
(A) Weight of a substance is the amount of matter present in it.
This is incorrect. The weight of a substance refers to the force of gravity acting on its mass. The mass, on the other hand, is the amount of matter in a substance.
(B) Mass is the force exerted by gravity on an object.
This is incorrect. The force exerted by gravity on an object is referred to as its weight, not its mass.
(C) Volume is the amount of space occupied by a substance.
This statement is true. Volume is indeed the measure of the amount of three-dimensional space an object occupies.
(D) Temperatures below 0°C are possible in Celsius scale, but in Kelvin scale negative temperature is not possible.
This statement is true. In the Kelvin scale, 0 K is the absolute zero point, and temperatures cannot go below this value. In the Celsius scale, temperatures can go below 0°C.
(E) Precision refers to the closeness of various measurements for the same quantity.
This statement is true. Precision is defined as the degree to which repeated measurements under unchanged conditions show the same results.
After analyzing the statements, the correct option is:
(C), (D) and (E) Only
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Approach Solution -2
Step 1: Analyze each statement.
(A) Weight of a substance is the amount of matter present in it.
❌ Incorrect. The amount of matter in a body is its mass, not its weight. Weight is the gravitational force acting on the mass of an object.
(B) Mass is the force exerted by gravity on an object.
❌ Incorrect. Mass is a scalar quantity that measures the amount of matter present in an object and is independent of gravity. The force exerted by gravity is called weight.
(C) Volume is the amount of space occupied by a substance.
✅ Correct. Volume represents the three-dimensional space occupied by matter, and it is measured in cubic units (e.g., m³, cm³).
(D) Temperatures below 0°C are possible in the Celsius scale, but in the Kelvin scale negative temperature is not possible.
✅ Correct. The Kelvin scale starts at absolute zero (0 K = −273.15°C), so negative temperatures do not exist on this scale. However, the Celsius scale allows temperatures below 0°C.
(E) Precision refers to the closeness of various measurements for the same quantity.
✅ Correct. Precision indicates the consistency or reproducibility of a set of measurements, irrespective of how close they are to the true value.
Step 2: Conclusion.
The correct statements are (C), (D), and (E) only.
Final Answer:
\[
\boxed{(C), (D), \text{ and } (E) \text{ Only}}
\]
