Explanation

A chord is a line segment whose ends lie on the ends of a circle.

Explanation

• Conduction: Heat transfer through direct contact between particles.
• Convection: Heat transfer through the movement of liquids or gases.
• Radiation: Heat transfer through electromagnetic waves.
• The Sun heats the Earth by radiation.
• Heat naturally moves from a hotter body to a colder body.

Explanation

In p-type semiconductors, a trivalent impurity is added, typically Boron.

Explanation

Newton's Second law of motion:

The rate of change of momentum of any object is directly proportional to the applied force on the body.

Explanation

A kilowatt-hour (unit symbol: kW⋅h or kW h; commonly written as kWh) is a non-SI unit of energy

equal to 3.6 megajoules (MJ) in SI units

.Kilowatt-hours are a common billing unit for electrical energy supplied by electric utilities.

Explanation

Cations are positively charged ions. 

Cations are formed when a metal loses its electrons.

Explanation

Explanation

The SI unit of pressure is Pascal (represented as Pa) 

in SI base units, one kilogram per meter per second squared (N/m2 or kg m-1s-2)

Definition of Pressure: Pressure can be defined as the force acting per unit area.

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The SI unit of energy/work is the joule (J)

Explanation

 Those substances through which electric current cannot pass are called insulators.

Insulators have very high electrical resistance

. For example, wood, rubber, glass, paper, plastic and wax are insulators of electricity.

Insulators cannot conduct electricity due to absence of free electrons in them.

Explanation

Glass is an insulator because it does not allow electricity to pass through easily.

Silver, copper, and aluminum are conductors, meaning they allow electric current to flow.