Physical Quantities

Speed and velocity are examples of ______ quantities

Physical

Why are speed and velocity physical quantities?

They can be measured

All physical quantities consist of a:

Numerical magnitude and a unit

In physics, ______ is used to represent physical quantities

Every letter of the alphabet

To represent a physical quantity, it must contain:

Both a numerical value and the unit in which it was measured

The letter v can be used to represent the physical quantities of:

Velocity, volume or potential difference (voltage)

______ provide the context as to what v refers to

Units

If v represents velocity, the unit would be:

m/s

If v represents volume, the unit would be:

m³

If V represents potential difference, the unit would be:

V

Diameter of an atom:

10^-10 m

Wavelength of UV radiation:

10 nm

Height of an adult human:

2 m

Distance between earth and sun:

1.5×10^11 m

Mass of a hydrogen atom:

10^-27 kg

Mass of an adult human:

70 kg

Mass of a car:

1000 kg

Seconds in a day:

90000 seconds

Seconds in a year:

3×10^7 seconds

Speed of sound in air:

300 m/s

Power of light bulb:

60 W

Atmospheric pressure:

1×10^5 Pa