Explanation

Heat transfer occurs through conduction, convection, and radiation.

Condensation is a phase change process (gas to liquid).

It is not a heat transfer method.

Explanation

Explanation

• Red (R) Green (G) and blue (B) colors are known as primary colors of light.
• Because of mixing these three colors we are able to make all possible colors.

Key Point

The primary colors of Pigment is:

• Red
• Yellow
• Blue

Explanation

The speed of sound in steel at 20°C is approximately 5100–5200 m/s, with 5130 m/s being a widely accepted value.

Sound travels faster in solids like steel due to their high density and elasticity compared to gases and liquids.

Explanation

The Big Bang occurred approximately 13.8 to 15 billion years ago, marking the origin of the universe.

It led to the rapid expansion of space, eventually forming galaxies, stars, and planets.