GENERAL KNOWLEDGE

GK

UNITS DEVICES DIMENSIONS AND MEASUREMENTS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The SI unit of “mass” is
A
Kg
B
Dyne
C
Joule
D
Newton
Explanation: 

Detailed explanation-1: -The SI unit of mass is the kilogram (kg). In science and technology, the weight of a body in a particular reference frame is defined as the force that gives the body an acceleration equal to the local acceleration of free fall in that reference frame.

Detailed explanation-2: -The prefix “Kilo” is used for both the name and symbol of kilogram and is equal to 1000 or 103 grams. Originally the gram was going to be the base unit, but due to historical reasons regarding an artifact used to define the kilogram, the kilogram was chosen as the SI base unit for mass.

Detailed explanation-3: -The units of mass in the metric system have the same prefixes as the units of length: 1 Kilogram (kg) = 1000 grams (g) 1 hectogram (hg) = 100 g. 1 decagram (dag) = 10g. 1 gram (g) = 1 g.

Detailed explanation-4: -Mass (symbolized m) is a dimensionless quantity representing the amount of matter in a particle or object. The standard unit of mass in the International System (SI) is the kilogram (kg).

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