Explanation

Given 12 = PQ, we can write P = 12/Q.

For proportion:

4 : Q = P : 3

4/ Q = P / 3

4 × 3 = P × Q

12 = PQ

This matches the given equation.

The answer is 4 : q = p : 3.

Explanation

a + b = 2 ... (1)

a - b = 2 ... (2)

Adding (1) and (2):

2a = 4

a = 2

Put a = 2 in (1):

2 + b = 2

b = 0

Now, a² + b² = (2)² + (0)² = 4 + 0 = 4.

Explanation

"Outing" refers to a short journey or trip, usually for pleasure.

Outing means ایک مختصر سفر

Excursion means ایک مختصر سفر

Explanation

Pesticides are chemicals used to kill or repel insects that damage plants and crops.

They help protect agricultural yield by controlling pest populations.

Explanation

Diffusion is the movement of particles from high to low concentration and occurs rapidly in gases, slowly in liquids, but is negligible in solids.

In solids, particles are tightly packed and cannot move freely, so diffusion does not occur significantly.

Explanation

High temperatures:

Monday = 75°F

Tuesday = 82°F

Wednesday = 78°F

Thursday = 84°F

Friday = 81°F

Total = 75 + 82 + 78 + 84 + 81 = 400°F

Mean = Total ÷ Number of days = 400 ÷ 5 = 80°F

Explanation

A Vernier caliper provides precise linear measurements of small objects.

It can measure internal, external, and depth dimensions with high accuracy (usually up to 0.1 mm or 0.01 cm).

Explanation

The Control Unit (CU) directs the flow of data and instructions within the CPU.

It manages communication between the memory, ALU, and input/output devices.

Explanation

Deserts form mainly due to very low or no rainfall over long periods.

This leads to dry, arid conditions with sparse vegetation.

Explanation

Caves are mainly formed when water erodes soluble rocks like limestone over long periods.

This process is called chemical weathering.

It is leads to underground hollow spaces.