Explanation

A red object reflects only red light.

A blue glass absorbs red light, so no light passes through → the object looks black.

Explanation

Displacement is the change in position of a body in a specific direction (a vector quantity).

Distance is the total path covered without considering direction.

Explanation

A liquid boils at its boiling point, where its vapor pressure equals the external atmospheric pressure.

Melting point is for solid → liquid change, not boiling.

Explanation

Explanation

Boyle’s Law: At constant temperature, pressure is directly proportional to density (P ∝ ρ).

This is because P ∝ 1/V, and since ρ = m/V, higher pressure means higher density for a fixed mass.

Explanation

The SI unit of impedance is the ohm (Ω).

Impedance, like resistance, is measured in ohms.

It can be represented as a complex number.

Explanation

The Kelvin scale is related to Celsius by: K = °C + 273.15.

Thus, 0°C = 273.15 K, which is the absolute temperature reference point.

Explanation

Curie (Ci) is a unit that measures the rate of radioactive decay.

1 Curie = 3.7 × 10¹⁰ disintegrations per second.

Explanation

Vostok Station is located in Antarctica.

It is the coldest place on Earth.

Temperatures there can drop below –89°C.

Explanation

Ernest Rutherford (1911) proposed the nuclear model of the atom with a dense central nucleus.

This came after his gold foil experiment, which showed atoms have a small, positively charged core.

He was a New Zealand-born British physicist who came to be known as the father of nuclear physics.