Explanation

Escape velocity depends on the mass and radius of a planet.  

   - Mercury has the lowest mass and smallest radius, hence the least escape velocity.  

Explanation

 The full proverb is "A good face needs no paint,"

This means natural beauty doesn't require artificial enhancement.

Explanation

The correct structure is "prevent someone from doing something."

So, "He prevented me from going there" is the correct sentence.

Explanation

The efficiency of a Carnot engine will be maximum if T2 is equal to absolute zero (0 Kelvin).

Explanation

Crystal lattices are classified into seven crystal systems based on their unit cell geometry.

These include:

1. Cubic
2. Tetragonal
3. Orthorhombic
4. Monoclinic
5. Triclinic
6. Hexagonal
7. Rhombohedral (Trigonal)

Explanation

If I am here, I shall come to you.

This is a first conditional sentence, used to express a real or possible situation in the future.

The structure is:

If + present tense, shall/will + base verb

So:

"If I am here" (present tense)

"I shall come to you" (future action)

Explanation

The correct phrase is "take care of" when referring to looking after something or someone.

Correct sentence: "Take care of your health."

Explanation

The substance with the most moles is 3.8 g of H2O (0.211 moles).

Therefore, it has the largest number of molecules. 

Explanation

“Fiddles” likely means wasting time, fidgeting, or avoiding doing the task seriously.

Rejects رد کرتا ہے۔ – Closest in meaning (implies resistance, unwillingness, or avoidance)

Explanation

STH (Somatotropic Hormone) is also known as Growth Hormone (GH).

It promotes protein synthesis even after the growth phase ends.

It plays a role in tissue maintenance, muscle development, and metabolism throughout life.