Explanation

Power = Work / Time = (Force × Distance) / Time

= (Mass × Acceleration × Distance) / Time

= [M] × [LT-2] × [L] / [T] = [ML2T-3].

Explanation

"When I heard him talk so" gives more information about the time of the action "was surprised," which is a function of an adverb clause.

It begins with the subordinating conjunction "when" and contains a subject ("I") and a verb ("heard"), forming a dependent clause.

Explanation

• The speed of sound in air at 0°C (32°F) is 332 meters per second.

The speed of sound in different materials:

• Air: 332 m/s
• Sea water: 1530 m/s
• Lead: 2160 m/s
• Gold: 3240 m/s
• Brick: 3650 m/s
• Copper: 4760 m/s
• Glass: 5100 m/s
• Aluminium: 6420 m/s

Explanation

Explanation

A funnel is a tube or pipe that is wide at the top and narrow at the bottom,

used for guiding liquid or powder into a small opening. 

Explanation

Unlike the others, a snake is a reptile.

The rest (Cat, Elephant, Dog) are mammals.

Explanation

1 dozen eggs = 12 eggs, costing Rs. 250.

Cost per egg =  250/12 Rs.

For 30 eggs, the cost =  30 × 250/12 = 250

​Let's calculate it:

Cost for 30 eggs = 30 × 250/ 12 = 30 × 20.83 = 625

Cost for 30 eggs =30×20.83=625

So, the cost price of 30 eggs is Rs. 625.

Explanation

Light Emitting Diodes are light sources that are energy efficient and can be made in a variety of colors.

Gallium is a soft, silvery metal used primarily in electronic

circuits, semiconductors, and light-emitting diodes (LEDs).

LEDs are comprised of compound semiconductor materials, which are made up of elements from group III and group V of the periodic table

SH5-8-2023

Explanation

It’s time he went to school.

اس کے سکول جانے کا وقت ہے۔

After "It’s time", we use the simple past tense to express present or future obligation.