Physical Quantities and Measurement Test - 3

The gram per cubic centimetre is a unit of density in the CGS system, defined as mass in grams divided by volume in cubic centimetres. The SI unit of kilogram per cubic metre (kg/m3) and the cgs unit of gram per cubic centimetre (g/cm3) are probably the most commonly used units fordensity. 1,000 kg/m3 equals 1 g/cm3. (The cubic centimeter can be alternately called a millilitre or a cc.)

The International System of Units, universally abbreviated S.I. is the modern metric system of measurement. The S.I. was established in 1960 by the 11th General Conference on Weights and Measures.

S.I system (standard international system).

In this system the units of mass, length and time are same, as that of M.K.S system.

However, it is an enlarged system encompassing all fundamental units.

Temperature is measured in Kelvin which is represented by K

Thus, 10 K is the correct representation of temperature.

Ampere-hour is the unit of quantity of electricity or quantity of electric charge.

Power is measured in Watt.

Energy is measured in Joules.

Strength of current ia measured in Amperes.

Impulse is defined as the change in momentum and thus impulse has the unit of momentum i.e.  kg m/s. The newton-second (also newton second; symbol: N⋅s or N s) is the derived SI unit of impulse. It is dimensionally equivalent to the momentum unit kilogram-metre per second (kg⋅m/s). One newton-second corresponds to a one-newton force applied for one second.

The kilowatt hour is a unit of energy equal to 1,000 watt-hours, or 3.6 megajoules. If the energy is being transmitted or used at a constant rate (power) over a period of time, the total energy in kilowatt-hours is the product of the power in kilowatts and the time in hours. The kilowatt-hour is commonly used as a billing unit for energy delivered to consumers by electric utilities.