Explanation

Cohesion is the attractive force between molecules of the same substance.

It is strongest in solids due to tightly packed molecules.

Explanation

The relation between the coefficient of volume expansion (γ) and the coefficient of linear expansion (α) is: γ = 3α

This relation holds true for isotropic solids.

The coefficient of volume expansion is approximately three times the coefficient of linear expansion.

Explanation

A matrix has an inverse only if its determinant is non-zero, meaning it is non-singular.

Singular matrices (with determinant = 0) do not have an inverse.

Explanation

Free and Liberate are synonyms (both mean to set free).

Covered and Concealed are also synonyms (both mean hidden or not visible).

Explanation

The Law of Excluded Middle states that for any proposition, either it is true or its negation is true—no third option exists.

It is a fundamental principle in classical logic.

Explanation

Explanation

To find Σ(x - 1), first calculate (x - 1) for each value:

(3 - 1) + (1 - 1) + (7 - 1) + (4 - 1)

= 2 + 0 + 6 + 3

= 11

Explanation

Mode is the value that occurs most frequently in a dataset.

It represents the most common or popular item in the data.

Explanation

Explanation

Assessment recognizes that learning is a continuous process and can change over time.

It helps track students’ progress and adapts teaching accordingly.