Explanation

• Water has its minimum density at 0°C.
• Water has its maximum density at 4°C.

Explanation

• Thermal Contraction is the decrease in size (length, area, and volume) of a body due to a decrease in temperature.
• Thermal Expansion is the opposite phenomenon, where the size increases due to an increase in temperature.

Explanation

• Thermal Expansion is the natural increase in size of a substance as its temperature increases.
• It's a common phenomenon in solids, liquids, and gases.

Explanation

• Measuring cylinders are designed to measure the volume of liquids.
• It allowing for precise measurements in scientific experiments and procedures.

Explanation

1 kilometre (km) = 1000 metres (m)

So 0.05 km = 0.05 x 1000 m = 50 m.

Explanation

1 kg = 1000 g

So 4 kg = 4 x 1000 g = 4000 g.

Explanation

• 10^-9 second = Nano second (ns)
• 10^-6 second = Micro second (μs)
• 10^-3 second = Milli second (ms)
• 10^-2 second = Centi second (cs)
• 10^-1 second = Deci second (ds)

Explanation

The correct order goes from smallest to largest: 1 millimetre (mm) = 0.1 centimetre (cm), and 1 centimetre (cm) = 0.01 meter (m).

Explanation

• The Second is the SI unit of time.
• It is defined as 9,192,631,770 periods of a caesium-133 atom's radiation.

Explanation

• The Second is a fundamental unit of time in the International System of Units (SI).
• It is one of the seven base units that are used to derive all other units.