Question

1. What is measurement?
2. What are fundamental units?
3. What is a physical quantity?
4. Write the SI units of length, mass and time. 5. Give few examples for representing the twenty-four-hour time format.
6. What are the two fixed points of a thermometer?
7. What is temperature?

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Answer 1

1)Measurement is the process of obtaining the magnitude of a quantity relative to an agreed standard. The science of weights and measures is called metrology

2) A base unit is a unit adopted for measurement of a base quantity. A base quantity is one of a conventionally chosen subset of physical quantities, where no quantity in the subset can be expressed in terms of the others.

3) A physical quantity is a property of a material or system that can be quantified by measurement. A physical quantity can be expressed as a value, which is the algebraic multiplication of a numerical value and a unit.

4) length = metre , mass = kilogram , time = second

5) time of day is written in the 24-hour notation in the form hh:mm (for example 01:23) or hh:mm:ss (for example, 01:23:45), where hh (00 to 23) is the number of full hours that have passed since midnight, mm (00 to 59) is the number of full minutes that have passed since the last full hour, and ss (00 to 59) is the ...

6) We define two fixed points in thermometer. One is the freezing point (t0) and boiling point (t100).

7)Temperature is a physical quantity that expresses hot and cold. It is the manifestation of thermal energy, present in all matter, which is the source of the occurrence of heat, a flow of energy, when a body is in contact with another that is colder or hotter. Temperature is measured with a thermometer.

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Answer 2

Answer:

1. Measurement” is the act of determining a target's size, length, weight, capacity, or other aspect.
2. a thing that is or is perceived as being the smallest part into which a complex whole can be analysed.
3. A physical quantity is a property of a material or system that can be quantified by measurement.
4. Unit of length — meter

Unit of mass — kilogram

Unit of time — second

Unit of electric current — amper

Unit of thermodynamic temperature — kelvin

5. A time of day is written in the 24-hour notation in the form hh:mm (for example 01:23) or hh:mm:ss (for example, 01:23:45), where hh (00 to 23) is the number of full hours that have passed since midnight, mm (00 to 59) is the number of full minutes that have passed since the last full hour, and ss (00 to 59) is the ...

6. We define two fixed points in thermometer. One is the freezing point (t0) and boiling point (t100).

7. Temperature is a physical quantity that expresses hot and cold. It is the manifestation of thermal energy, present in all matter, which is the source of the occurrence of heat, a flow of energy, when a body is in contact with another that is colder or hotter. Temperature is measured with a thermometer. Wikipedia

Explanation:

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