Explanation

• Blue stars are hotter than red and orange stars.
• The temperature of stars increases from red to orange to yellow to white to blue, with blue stars being the hottest.

Explanation

• When a sound wave travels from one place to another, it transports energy from the source of the sound to the surrounding environment.
• Sound waves are a form of mechanical energy that is transferred through the vibration of particles in a medium, such as air or water.

Explanation

• Dispersion of light refers to the splitting of white light into its component colors, which are also known as the visible spectrum.
• This occurs when light passes through a medium with a refractive index that varies with wavelength, such as a prism.

Explanation

Reflecting prisms work on the principle of total internal reflection, where light is completely reflected back into the prism material rather than passing through the interface.

Explanation

• Convection is the primary mode of heat transfer in liquids and gases, where heat is transferred through the motion of fluids.
• This motion creates circulation currents that carry heat energy from one location to another.

Explanation

• In a longitudinal wave, a compression is a region where the particles are closest together.
• While a rarefaction is a region where the particles are farthest apart.

Explanation

• Renewable sources, such as solar energy, wind energy, hydro energy, and biomass, are sustainable and can be replenished naturally.
• They can be used over and over again, making them virtually unlimited.

Explanation

Potential energy is stored energy due to an object's position or state.

Examples:

• A stretching spring (elastic potential energy)
• A stone lying at a height (gravitational potential energy)
• A book placed on a table (gravitational potential energy)
• A pressed spring (elastic potential energy)

Explanation

• Insulators are materials that resist the flow of electricity, such as rubber, glass, wood, and plastic.
• They have a high resistance to electric current and are used to prevent the flow of electricity.

Explanation

• Velocity is the speed of a body in a specific direction.
• It is a vector quantity, which means it has both magnitude (amount of movement) and direction.