Explanation

The discovery method encourages students to investigate, explore, and find information on their own.

It promotes deep understanding and active engagement with the content.

Explanation

A switch operates at the Data Link Layer (Layer 2) of the OSI model.

It uses MAC addresses to forward data frames within a local network.

Explanation

1. Simplex: Data flows in one direction only (e.g., keyboard to computer).
2. Half-Duplex: Data can flow both ways, but not at the same time (e.g., walkie-talkies).
3. Full-Duplex: Data flows both ways simultaneously (e.g., telephone conversations).

Explanation

"The" is used to refer to something specific or already known to the listener.

Since "blue T-shirt over there" is a specific item, "the" is the correct article.

Explanation

Speed of sound in air is proportional to the square root of absolute temperature v ∝ √T.

To double the speed, temperature must increase 4 times in Kelvin:

At 27°C = 300 K → 4 × 300 = 1200 K → 1200 - 273 = 927°C

Explanation

For projectile motion, two complementary angles θ and 90° - θ give the same range if the initial velocity is constant.

Since 10° + 80° = 90°, the angles 10° and 80° are complementary and will have equal ranges.

Explanation

"The" is used when referring to a specific group, like "The Europeans" as a general class.

It's appropriate here to describe a known or general characteristic of Europeans.

Explanation

Given a ≠ 0, b ≠ 0, and ab = 0:

In this case, a and b are called Zero divisors.

Explanation

Imperative sentences give commands, instructions, or requests — like telling someone to move chairs.

They often omit the subject "you" and start with a verb directly.

Explanation

Nickel is a micronutrient essential for the activity of the enzyme urease, involved in nitrogen metabolism.

It helps in converting urea into usable forms of nitrogen for plants.