Explanation

Ball bearing reduces friction by using smooth balls lubricated with oil or grease

that freely roll between a smooth inner and outer surface.

SH5-8-2023

Explanation

Sulfuric acid is a mineral acid composed of the elements sulfur, oxygen and hydrogen.

It is a colorless, odorless and viscous liquid that is miscible with water.

Explanation

The Earth moves in two primary motions: Rotation (spinning on its axis) and Revolution (orbiting around the Sun).

Rotation causes day and night, while revolution leads to seasons.

Explanation

• An Exothermic Reaction is a chemical reaction that releases or gives off heat, often accompanied by light, sound, or other forms of energy.
• This type of reaction involves a decrease in the system's energy, which is released into the surroundings as heat.

Explanation

Renewable energy is energy derived from natural sources that are replenished at a higher rate than they are consumed. Sunlight and wind, for example, are such sources that are constantly being replenished.

Explanation

The neutron is a neutral particle,

which is stable only in the confines of the nucleus of the atom.

Explanation

• Insomnia is a sleep disorder in which we have trouble falling and/or staying asleep. Such as,
  

  In Insomnia Difficulty falling asleep

  In Insomnia Difficulty staying asleep

  In Insomnia Difficulty returning to asleep after walking

  Insomnia نیند نہ آنے کی بیماری 

  
  

Explanation

Explanation

Kepler's law explains the motions of planets in the solar system.

Kepler's Laws of Planetary Motion

They describe how:

(1) planets move in elliptical orbits with the Sun as a focus

(2) a planet covers the same area of space in the same amount of time no matter where it is in its orbit

(3) a planet's orbital period is proportional to the size of its orbit (its semi-major axis).

Explanation

The lithosphere is the rocky outer part of the Earth.

It is made up of the brittle crust and the top part of the upper mantle.

The lithosphere is the coolest and most rigid part of the Earth.