Explanation

The roadway would cause diffuse reflection due to its rough surface

some examples where diffused reflection

• Desert sand,
• disturbed water surface,
• and rough roads  
  

Explanation

Non-renewable energy sources:

• Oil
  
• Nuclear energy
• Petroleum
• Natural gas & coal

Renewable sources of energy:

• Solar energy
• Wind energy
• Hydroelectric power
• Biomass energy
• Geothermal energy
• Tidal energy

Explanation

the direction of the magnetic field lines gets reversed when the direction of the current flowing through the conductor is reversed.

Explanation

• Sound energy is the energy created by the vibration of particles, such as molecules or atoms, as they oscillate back and forth.
• This vibration creates a disturbance that travels through a medium, like air, water, or solids, and is perceived as sound.

Explanation

The quantity of matter in a body is called its mass.

Explanation

In the metric system, the SI unit of length is a meter which is

defined as: “The length of the path traveled by light in a vacuum within 1⁄299792458 seconds.”

Common symbols: l

ND18-9-2023

Explanation

• The hottest stars appear blue in color.
• Blue stars are very hot, with surface temperatures reaching tens of thousands of degrees Celsius.
• It emitting predominantly blue and ultraviolet light.

Explanation

The nucleus, formed by a nuclear membrane around a fluid nucleoplasm, is the control center of the cell.

Threads of chromatin in the nucleus contain deoxyribonucleic acid (DNA), the genetic material of the cell.

Explanation

• The sun rises in the East and sets in the West.
• This means that the Earth is rotating from West to East. 
• Earth revolves in orbit around the Sun in 365 days, 6 hours, 9 minutes.
• With reference to the stars, at a speed ranging from 29.29 to 30.29 km/s.
• The 6 hours, 9 minutes add up to about an extra day every fourth year,
• which is designated a leap year, with the extra day added as February 29th.

Last updated 06 Nov 2026 by NA

Explanation

CNES is a space agency in France

CNES stands for National Centre for Space Studies.

CNES Formed  in 19 December 1961