Explanation

A scalar matrix is a diagonal matrix where all diagonal elements are equal, and all other elements are zero.

Example:

[5 0

0 5]

Here, all diagonal elements are 5, and others are zero.

Explanation

جھوٹ بولنا ایک بری عادت ہے۔

Tell lies means جھوٹ بولنا

The phrase "to tell lies" correctly uses the infinitive form of the verb, which is appropriate in this context.

The sentence is grammatically sound, clearly conveying that telling lies is a bad habit.

Explanation

The given set:

{x|x ∈ N, 1 ≤ x < 4}

Can be read as:

The set of all natural numbers x such that 1 ≤ x < 4

This includes the numbers 1, 2, and 3, but excludes 4.

Explanation

1 is not a prime number because it has only one factor (1).

It’s also not composite because composite numbers have more than two factors.

Explanation

"Which is very old" is a relative clause because it provides additional information about the noun "house" in the main sentence.

A relative clause typically begins with a relative pronoun like "which," "who," or "that."

Explanation

A folk tale is a traditional story passed down orally through generations.

These stories often include myths, legends, and moral lessons, making them popular in cultures worldwide.

Explanation

William Wordsworth, was the famous English poet.

He was born on April 7, 1770.

He passed away on April 23, 1850.

Explanation

The critical angle for water (from water to air) is approximately 48.6°, rounded to 49°.

This is the angle of incidence above which total internal reflection occurs when light travels from water to air.

Explanation

Parentheses ( ) are used to add extra information or clarification within a sentence.

In "(the architect)", parentheses enclose additional but non-essential information about Hameed Ullah Khan.

Explanation

The teacher should assess whether the emotional outbursts are a result of unreasonable demands and adjust accordingly.

It’s important to create a supportive environment where emotional needs are considered.