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

Rectangle : Cylinder → A rectangle is a 2D shape; a cylinder is a 3D shape with a rectangular (curved) side base.

Triangle : Cone → A triangle (2D) relates to a cone (3D shape with a triangular cross-section).

Explanation

The sentence starts with "After he had researched," which is past perfect tense. The correct structure to follow is:

"had + past participle" → "had researched and written".

Explanation

A variable is a named memory location whose value can change during the execution of a program.

In contrast, a constant has a fixed value that does not change while the program runs.

Explanation

Semantic refers to the meaning of a statement in a programming language.

Syntax refers to the structure or rules of writing code.

The compiler translates code into machine language.

Explanation

When two circles touch each other externally, they have a single point of contact.

The distance between their centers (C1C2) is equal to the sum of their radii (r1 + r2).

Explanation

Explanation

Arrive : Depart is a pair of opposites.

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