Explanation

Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature.

This allows for highly efficient electrical conduction and magnetic field exclusion.

Explanation

• Biomass energy is derived from organic matter such as wood, crops, and waste.
• It is used as a fuel to produce heat energy.
• This heat energy can be used for various purposes, including heating homes, water, and air, as well as powering industrial processes and generating electricity.

Explanation

• Apollo 11 was the mission that successfully landed astronauts.
• Neil Armstrong and Buzz Aldrin on the moon on July 20, 1969.

Explanation

• Mass is a measure of the amount of matter in an object, and it remains constant regardless of where you are in the universe.
• Your mass on Earth is the same as your mass on the Moon, because you are still made up of the same amount of matter.
• However, your weight (the force exerted on you by gravity) would be different on the Moon, because the Moon has a much weaker gravitational field than Earth.

Explanation

• A close circuit, also known as a closed circuit.
• It is an electrical circuit that is complete and allows electricity to flow from the power source, through the wire, and to the bulb, causing it to light up.

Explanation

• Sound travels through a physical medium, such as air, water, or solid objects.
• It is transmitted through the vibration of particles in the medium.

Explanation

The force exerted by the atmosphere on the surface of the water is equal to the pressure multiplied by the area of the surface:

Force = Pressure x Area

= 100 kPa x (2 m x 1 m)

= 100,000 Pa x 2 m^2

= 200,000 N

= 200 kN

Explanation

The Angstrom (Å) is commonly used to measure wavelengths of light, where

1 Å = 10⁻¹⁰ meters.

Light wavelengths typically range from 4000 Å to 7000 Å.

Explanation

Explanation

Force is not a base quantity; it is calculated using base quantities (mass and acceleration).

It is a derived quantity because its SI unit (Newton) comes from kg·m/s².