Explanation

To find the range, subtract the smallest value from the largest value:

Maximum value = 28

Minimum value = 20

Range = Maximum value - Minimum value

= 28 - 20

= 8

Explanation

Certain and Unsure are opposites.

Hard and Soft are also opposites, so this analogy fits the pattern.

Explanation

Explanation

X-rays are electromagnetic waves and not charged particles, so they are not deflected by electric or magnetic fields.

They travel in straight lines, affect photographic plates, and have properties of electromagnetic radiation.

Explanation

The atomic number of silver (Ag) is 47. Its electronic configuration is [Kr] 4d¹⁰ 5s¹.

The valence electrons are in the outermost shell, which is the 5s orbital with 1 electron.

The number of valence electrons is 1.

Explanation

A D.C. generator uses split rings (commutator) to reverse the current direction in the coil every half rotation.

This ensures that the output current flows in one direction (direct current).

Explanation

Arrive : Depart is a pair of opposites.

Similarly, Use and Misuse are opposites — one is proper use, the other is wrong use.

Explanation

The phrase "eating out" means having a meal outside the home, usually at a restaurant.

So, "We are eating out tonight" is correct.

Explanation

"People" is plural, so the verb must be plural too.

"Were" is the past tense plural form of "to be," matching the sentence context.

Explanation

Oscillatory systems gradually lose energy due to frictional forces (like air resistance or internal damping).

This damping reduces amplitude over time, preventing indefinite oscillation.