Explanation

Explanation

Gears work on the principle of transmitting rotational force from one gear to another.

This helps in changing the speed, direction, or torque in a mechanical system.

Explanation

The traveler covers:

First journey: x km

Second journey: y km

Third journey: x km

Total distance = x + y + x = 2x + y

Explanation

Pitch determines whether a sound is shrill (high-pitched) or grave (low-pitched).

It depends on the frequency of the sound waves — higher frequency means higher pitch.

Explanation

Supplementary angles add up to 180°. Given:

One angle = 122°

Let the other angle be x. Then:

x + 122° = 180°

Subtract 122° from both sides:

x = 58°

Explanation

When kidneys stop working permanently, the most effective long-term solution is kidney transplantation.

It replaces the failed kidney with a healthy one from a donor, restoring normal function.

Explanation

Lungs remove carbon dioxide, a waste product of cellular respiration.

It is carried by the blood to the lungs and exhaled out of the body.

Explanation

A color palette is a flat surface used by artists to mix and hold paints while working.

It is an essential tool in painting for organizing and blending colors efficiently.

Explanation

Scholar sheets are often used in crafts due to their smooth texture and flexibility, making them suitable for flower making.

They are easy to cut, fold, and shape into petals and floral designs.

Explanation

A square has all four sides equal in length.

So, knowing the length of one side is enough to draw the entire shape.