1What is volume?
Volume is a property associated with cubic measure.
2What is the unit of volume?
The unit of volume is the cubic metre (m³) along with its multiples and submultiples.
3What is an alternative unit of volume?
The litre (L) is sometimes used as an alternative unit of volume.
4How many cubic decimetres are in one litre?
1 litre = 1 cubic decimetre (1 dm³).
5Is the litre a preferred SI unit?
No, the litre is a non-preferred SI unit, but it is commonly used.
6What happens when the volume of a substance increases?
The substance is said to have expanded.
7What happens when the volume of a substance decreases?
The substance is said to have been compressed.
8What is specific volume?
Specific volume is the volume occupied by a unit mass.
9What is the basic unit of specific volume?
The basic unit of specific volume is cubic metres per kilogram (m³/kg).
10What is the reciprocal of density?
Specific volume is the reciprocal of density.
11In what other units can specific volume be expressed?
Specific volume can be expressed in cubic metres per tonne (m³/t) and litres per kilogram (L/kg).
12What symbol represents specific volume?
Specific volume is given the symbol “v”.
13What is energy?
Energy is the capacity for doing work.
14How is energy measured?
Energy is measured by the work done in a given time.
15In what units is energy expressed?
Energy is expressed in joules (J), kilojoules (kJ), and megajoules (MJ).
16What is another useful unit of energy?
The kilowatt-hour (kWh) is another useful unit of energy.
17What does 1 kWh represent?
1 kWh represents the energy used when 1 kilowatt of power is exerted continuously for 3600 seconds (1 hour).
18What is the formula for energy?
Energy = power × time.
19How many joules are in 1 kWh?
1 kWh = 3.6 × 10⁶ J = 3.6 MJ.