Question

In present times what are the instrument used for the measurment std 8
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Answer 1

Answer:

A measuring instrument is a device for measuring a physical quantity. In the physical sciences, quality assurance, and engineering, measurement is the activity of obtaining and comparing physical quantities of real-world objects and events. Established standard objects and events are used as units, and the process of measurement gives a number relating the item under study and the referenced unit of measurement. Measuring instruments, and formal test methods which define the instrument's use, are the means by which these relations of numbers are obtained. All measuring instruments are subject to varying degrees of instrument error and measurement uncertainty. These instruments may range from simple objects such as rulers and stopwatches to electron microscopes and particle accelerators. Virtual instrumentation is widely used in the development of modern measuring instruments.

1. Time

• TimeWatch, a time measurement device
• TimeWatch, a time measurement deviceMain article: Time
• TimeWatch, a time measurement deviceMain article: TimeIn the past, a common time measuring instrument was the sundial. Today, the usual measuring instruments for time are clocks and watches. For highly accurate measurement of time an atomic clock is used. Stop watches are also used to measure time in some sports.

1. Energy Edit

• Energy EditMain article: Energy
• Energy EditMain article: EnergyEnergy is measured by an energy meter. Examples of energy meters include:

• Energy EditMain article: EnergyEnergy is measured by an energy meter. Examples of energy meters include:Electricity meter Edit
• Energy EditMain article: EnergyEnergy is measured by an energy meter. Examples of energy meters include:Electricity meter EditAn electricity meter measures energy directly in kilowatt hours.

• Energy EditMain article: EnergyEnergy is measured by an energy meter. Examples of energy meters include:Electricity meter EditAn electricity meter measures energy directly in kilowatt hours.Gas meter Edit
• Energy EditMain article: EnergyEnergy is measured by an energy meter. Examples of energy meters include:Electricity meter EditAn electricity meter measures energy directly in kilowatt hours.Gas meter EditA gas meter measures energy indirectly by recording the volume of gas used. This figure can then be converted to a measure of energy by multiplying it by the calorific value of the gas.

Answer 2

Answer:

today the usual measuring instrument for time are clocks and watches. For highly accurate measurement of time automatic clock is used. stopwatches are also used to measure time in some sports..