Explanation

A converging lens (usually convex) bends parallel rays of light to meet at a single point (focus).

It is commonly used in magnifying glasses and optical instruments.

Explanation

Explanation

A neuron is the basic structural and functional unit of the nervous system

It often shown with a long axon, dendrites, and cell body.

It transmits electrical impulses in the body.

Explanation

• The oesophagus is a muscular tube that connects the pharynx (throat) to the stomach.
• Its main function is to transport food from the pharynx to the stomach through peristalsis (wave-like muscle contractions).

Explanation

Explanation

Momentum is the product of an object’s mass and its velocity → Momentum = Mass × Velocity.

Momentum is given by the formula: p = mv

It is a vector quantity.

It is conserved in closed systems during collisions.

It depends on mass and speed, not on acceleration, so momentum is independent of acceleration.

Explanation

First law of motion is also called the Law of Inertia.

It states that an object will stay at rest or move with constant velocity unless an external force changes its state.

Explanation

Perfect  مکمل کرنا

Flawless  بے عیب

ND20-2-2023

Explanation

Gravitational force is the natural force of attraction between any two masses in the universe.

This force is always attractive.

It acts along the line joining the centers of the two masses.

Explanation

A food chain always begins with producers.

It usually green plants or algae, that make their own food through photosynthesis.