Explanation

Space garments are designed with thermal insulation to regulate astronauts' body temperature.

They can reduce body heat loss by 40% to 60%, preventing extreme temperature fluctuations in space.

Explanation

Autorefractor is used to measure refractive errors in the eye.

Ophthalmic Tomography (OCT) helps detect cornea and lens obstructions.

Explanation

Explanation

The idiom "as different as night and day" means two things are completely opposite.

Although we are brothers, but we are as different as day and night.

Explanation

Learnt is the second and third form of Learn.

Learn means سیکھنا یا علم حاصل کرنا

A transitive verb required an object while intransitive verb does not.

Explanation

Like terms are terms that have the same variable(s) with the same exponent(s).

x² and - √3x² are like terms because they both have the same variable (x) with the same exponent (²).

Explanation

To find the greatest number of students that can accommodate 135, 180, and 225 completely, we need to find the Highest Common Factor (HCF) of these numbers.

Step 1: Prime Factorization

135 = 3³ × 5

180 = 2² × 3² × 5

225 = 3² × 5²

Step 2: Identify Common Factors

Common factors = 3² × 5 = 9 × 5 = 45

Explanation

We use the unitary method:

Cost of 30 kg sugar = Rs. 1200

Cost of 1 kg sugar = 1200 ÷ 30 = Rs. 40

Cost of 35 kg sugar = 40 × 35 = Rs. 1400

Explanation

Let's calculate the value of 3x – 4y – z using x = 2, y = -3, z = -5:

3(2) – 4(-3) – (-5)

= 6 + 12 + 5

= 23

Explanation

A prime number has only two distinct factors, 1 and itself (e.g., 2, 3, 5, 7).

It cannot be divided by any other number without leaving a remainder.