Explanation

A light year is the distance light travels in one year.  

   - Since it's a measure of length, its dimension is [L].  

Explanation

Cubic meter (Cubic meter is a unit of volume, not distance.)

Explanation

It is the total heat content of a system when the pressure is constant.

It helps us understand energy changes in chemical reactions.

Explanation

The moon's surface is covered with a layer of fine dust called regolith.

This layer consists of tiny fragments of rock and mineral particles created by meteorite impacts.

Explanation

The Boolean expression for an AND gate is A . B, where A and B are the inputs.

This expression reads "A and B".

In Boolean algebra, the AND operation is represented by a dot (.) or a logical multiplication symbol (∧).

So, the expression A . B or A ∧ B represents the AND operation.

Explanation

When a wire is placed perpendicular to a magnetic field, the force on the wire is proportional to the current flowing through it.

If the current increases, the force on the wire will also increase.

Explanation

A magnifying glass is also known as a simple microscope.

Because it magnifies objects, making them appear larger than they actually are.

It is called "simple" because it consists of a single lens.

Explanation

The eyepiece lens has a shorter focal length compared to the objective lens.

It typically around 1-2 cm.

Explanation

When water waves pass from a deep region to a shallow region, they are refracted, which means they change direction.

The speed and wavelength of the waves also change, but the frequency remains constant.

Explanation

In a solid, the particles (atoms, molecules, or ions) are closely packed and vibrate in place, holding their position in the crystal lattice.

This vibration is due to thermal energy, and the particles oscillate around their fixed positions.

Key Points:

• In a gas, particles are widely spaced and move freely.
• In a liquid, particles are close together but move past each other.