Explanation

In a concave mirror, the image size depends upon the:

• Position of the object relative to the mirror's focal point (f)
• Center of curvature(C)

Additional information

• Concave lenses are also known as diverging lenses. 

Last updated on 09-03-2026

Explanation

Definition: Possess both magnitude and direction.

Representation: Represented by arrows, where the length indicates magnitude and the arrowhead indicates direction.

Examples: 

• Displacement
• Velocity
• Acceleration
• Force
• Momentum

Additional information 

Difference from Scalars: Unlike scalars, which only have magnitude (e.g., speed), vectors require both to be fully defined

Last updated on 09-03-2026

Explanation

• Weight is a vector quantity
• Because it is a force defined as the product of mass and the acceleration due to gravity (W = mg).
• It has both magnitude (amount of force) and direction (downward, towards the center of the Earth)

Additional information 

Mass,  Time, and temperature are scalar quantities

Last updated on 09-03-2026

Explanation

Explanation

• An inclined plane is a flat surface tilted at an angle to help move objects up or down with less effort.
• It reduces the force needed compared to lifting vertically.
• Mechanical advantage = distance along incline ÷ vertical height.

Last verified on 08-03-2026

Explanation

• Peanuts are a legume and a good source of protein,
• It containing about 20.5 grams of protein per 100 grams.

Additional information:

• Apples: 0.3 grams of protein per medium-sized fruit
• Watermelon: 0.6 grams of protein per cup
• Mango: 1.4 grams of protein per cup

Last verified on 08-03-2026

Explanation

• Weight depends on gravitational force acting on mass.
• The Moon’s gravity is about 1/6th of Earth’s, so your weight decreases.
• Your mass remains the same, only weight changes.

Additional information:

• Weight change occurs due to difference in gravity.
• Mass is constant everywhere in the universe.

Last verified on 08-03-2026

Explanation

• Weight is the force of gravity acting on an object's mass.
• It depends on mass of the object and gravitational acceleration (g).
• Formula: Weight (W) = Mass × Gravity (W = m × g)

Additional information:

• Earth: g ≈ 9.8 m/s²
• Moon: g ≈ 1.6 m/s² (weight is less)

Last verified on 08-03-2026

Explanation

• Frictional force arises when two surfaces slide or move against each other.
  • It opposes the motion and can generate heat.
  • Friction is essential in walking, driving, and machine operation.

Last verified on 08-03-2026

Explanation

• A diluted solution has a low ratio of solute to solvent, meaning it contains less solute.
• It is the opposite of a concentrated solution, which has more solute.
• Diluted solutions are often used when a weaker solution is needed.

Last verified on 08-03-2026