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What is the SI unit used to measure very small lengths, such as the thickness of a paper?
- a)Centimetre
- b)Millimetre
- c)Micrometre
- d)Nanometre
Correct answer is option 'B'. Can you explain this answer?
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What is the SI unit used to measure very small lengths, such as the th...
The millimetre (mm) is commonly used to measure small lengths, such as the thickness of a paper. One millimetre is equal to one-thousandth of a metre, making it suitable for measuring small dimensions. The micrometre and nanometre are used for even smaller measurements, typically in scientific fields. The centimetre is also used for small measurements but is larger than a millimetre.
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What is the SI unit used to measure very small lengths, such as the th...
Understanding Units of Measurement for Length
When measuring very small lengths, it is essential to choose the right unit to accurately represent the dimensions.
Common Units of Length
- Centimeter (cm): This unit is commonly used for measuring larger items, such as the height of a person or the dimensions of furniture. One centimeter equals one-hundredth of a meter.
- Millimeter (mm): This unit is often used for smaller objects, such as the thickness of a credit card or small mechanical components. One millimeter equals one-thousandth of a meter.
- Micrometer (μm): This unit is useful for measuring microscopic dimensions, such as cells or bacteria. One micrometer equals one-millionth of a meter.
- Nanometer (nm): This is used for even smaller measurements, such as wavelengths of light or the size of molecules. One nanometer equals one-billionth of a meter.
Why Millimeter is the Correct Choice
For the thickness of a standard piece of paper, the most suitable unit is the millimeter.
- Typical Thickness: The average thickness of paper is about 0.1 to 0.5 millimeters, making it easy to measure in millimeters rather than micrometers or nanometers, which would result in awkward numbers.
- Convenience: Using millimeters allows for a more straightforward measurement that is easy to visualize and compare with other everyday items.
In conclusion, while micrometers and nanometers have their places in science and technology, millimeters are the most practical choice for measuring the thickness of paper, making option 'B' the best answer.
When measuring very small lengths, it is essential to choose the right unit to accurately represent the dimensions.
Common Units of Length
- Centimeter (cm): This unit is commonly used for measuring larger items, such as the height of a person or the dimensions of furniture. One centimeter equals one-hundredth of a meter.
- Millimeter (mm): This unit is often used for smaller objects, such as the thickness of a credit card or small mechanical components. One millimeter equals one-thousandth of a meter.
- Micrometer (μm): This unit is useful for measuring microscopic dimensions, such as cells or bacteria. One micrometer equals one-millionth of a meter.
- Nanometer (nm): This is used for even smaller measurements, such as wavelengths of light or the size of molecules. One nanometer equals one-billionth of a meter.
Why Millimeter is the Correct Choice
For the thickness of a standard piece of paper, the most suitable unit is the millimeter.
- Typical Thickness: The average thickness of paper is about 0.1 to 0.5 millimeters, making it easy to measure in millimeters rather than micrometers or nanometers, which would result in awkward numbers.
- Convenience: Using millimeters allows for a more straightforward measurement that is easy to visualize and compare with other everyday items.
In conclusion, while micrometers and nanometers have their places in science and technology, millimeters are the most practical choice for measuring the thickness of paper, making option 'B' the best answer.
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