MEASUREMENTS

MEASUREMENT IN PHYSICS

Measurement is the process of giving a number to a physical quantity using a specified unit of measurement.The measurement  is measured by comparing it to a standard unit of measurement.

Measurement is a key concept in physics that is required for accurate and exact measurements of physical quantities.The process of measuring physical quantities or attributes of objects and phenomena is referred to as measurement in physics.

Measurement is a complicated and crucial issue in physics because it allows scientists to characterise, compare, and predict the behaviour of physical systems.

SEVEN FUNDAMENTAL PHYSICAL QUANTITIES IN PHYSICS

The seven fundamental physical quantities in physics are

Length	meter(m)
Mass	Kilogram(Kg)
Time	Seconds(s)
Electric current	Ampere(A)
Amount of substance	mole (mol)
Temperature	Kelvin(K)
Luminous intensity	Candela(Cd)

IMPORTANT CONCEPTS IN MEASUREMENTS

• PRECISION
• ACCURACY
• ERROR
• UNCERTAINTY

ACCURACY

• Accuracy in maths, science, and engineering is the measure of how closely a value is measured to its genuine value.For instance, measurements of a wire’s resistance are quite precise since they are very near to the true value.
• In maths, science and engineering accuracy refers to how close the
• Accurate measurement is important in order to obtain reliable results
• Accuracy and reliability is essential for safety and mission success.
• Importance of measurement accuracy is especially important for the space launch system.
• GPS processing on a global scale is revolutionary.World’s global positioning systems have high accuracy.
• Accurate measurement has no systematic and random errors.

PRECISION

Precision refers to how close multiple measurements are to each other in order to obtain consistent precise measurements are required.

ERROR

The common errors are human error,random error, imprecision of the measuring instrument and inaccuracy of the measuring instrument.

MEASUREMENT

LENGTH

SOLIDS

TIME

VOLUME

METRIC CONVERSION

The process of changing measurement from one metric unit to another within the international system of units (S.I) is known as metric conversion in physics.

The decimal system, with all units based on multiples of ten, provides a consistent and widely recognised foundation for measures in science and daily life.This approach makes unit conversion simple.

Metric conversions are an important component of physics.Metric conversion can be done using a conversion table, a calculator, or by hand.These metric conversions are used to measure physical occurrences as well as to develop and evaluate physical hypotheses.Physics would be a considerably less exact and productive subject without metric conversion.