Explanation

The transfer of thermal energy from one substance to another that requires no physical medium is called radiation.

Radiation is the process by which thermal energy (heat) is transferred through electromagnetic waves, such as infrared radiation. 

They can occur in a vacuum, such as in the transfer of heat from the Sun to the Earth.

Unlike conduction and convection, which require a physical medium (solids, liquids, or gases), 

Explanation

Internal energy is primarily a function of temperature.

For a given substance, internal energy (U) is related to the temperature of the system, as it reflects the kinetic and potential energy of the molecules.

Explanation

 A DIAC is a full-wave or bi-directional semiconductor switch that can be turned on in both forward and reverse polarities.

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

• Non-renewable sources, such as fossil fuels (coal, oil, and gas), nuclear energy, and minerals.
• They are limited in supply and cannot be replenished in a short period of time.
• Once they are used, they are gone forever.

Explanation

• The fuel (gasoline or diesel) in a car is a form of chemical energy, which is stored in the bonds of the fuel molecules.
• When the fuel is burned in the engine, this chemical energy is converted into kinetic energy (the energy of motion) through a series of processes, including combustion, transmission, and propulsion.

Explanation

• When Hyder hits the nail with a hammer, kinetic energy (the energy of motion) is involved as the hammer moves towards the nail.
• Sound energy is also involved as the hammer strikes the nail, producing a sound.
• However, electrical energy is not involved in this process.

Explanation

• The batteries in the toy car store chemical energy.
• It is converted into electrical energy when the batteries are connected to the toy car's motor.

Explanation

• Kinetic energy is the energy of motion.
• It is the energy an object possesses when it is in motion, such as a rolling ball, a moving car, or a flying bird.
• The amount of kinetic energy an object has depends on its mass and velocity.

Explanation

USA has the largest hydrocarbon dumps.