Explanation

• Specular (Regular) reflection occurs when a parallel beam of light hits a smooth surface, such as a mirror.
• It is reflected as parallel rays, maintaining its original direction and intensity.

Examples:

• Polished metal surfaces
• Calm surface of a lake
• Calm water and mirrors

Explanation

• A movable pulley is a type of pulley system where the pulley is free to move along the rope or cable.
• This allows the force applied to the rope to be multiplied, making it easier to lift or move heavy loads.
• Movable pulleys are commonly used in cranes, winches, and other lifting machines.

Explanation

• When light travels in a straight line and strikes the surface of another medium, it reflects off the surface and changes direction.
• This is known as reflection.

Explanation

A car's steering system uses a wheel and axle.

It is mechanism to transmit the rotational motion of the steering wheel to the wheels of the car, allowing the vehicle to turn.

Explanation

• Cranes use movable pulleys to lift and move heavy loads.
• The pulleys are attached to a cable or rope that wraps around a drum or wheel.
• It allowing the load to be lifted or moved in a vertical direction.

Explanation

A movable pulley decreases the amount of input force needed to lift a load.

By allowing the user to apply force over a longer distance.

Explanation

• Thermal energy is the form of energy that is transferred from one body to another due to a difference in temperature, and is received from heat.
• It is the energy of motion of particles in a substance, such as atoms or molecules, and is often referred to as "heat energy".

Explanation

• The incorrect statement about suspension is: The suspension is transparent and clear

Suspensions are typically characterized by:

• Being heterogeneous mixtures
• Having dispersed solute particles
• Having varying color and appearance throughout
• Being translucent or opaque

Explanation

• The solution is a homogeneous mixture
• In a solution the particles of solute and solvent are mixed
• The colour and appearance are same in every part of the solution
• The solution is clear and transparent

Explanation

• Suspensions are mixtures in which the solute particles are dispersed throughout the solvent, but are not dissolved.
• The particles are visible to the naked eye and settle out of the mixture over time.
• Examples: Muddy water, milk and blood.