Physics

a small particle in an atom with negative charge

Electrons flow through wires to create electric current.

a small positively charged particle present in atoms

The number of protons in an atom defines its atomic number.

a small particle with no charge present in atoms

Neutrons act as "glue" in the nucleus, preventing proton repulsion.

the smallest possible amount of a particular quantity that cannot be divided any further

The behavior of subatomic particles is governed by the principles of quantum mechanics.

the physical and mental strength required for activity, work, etc.

After studying all night, he had no energy left for the exam.

a group of trained and organized people such as the police, soldiers, etc.

The police force worked tirelessly to maintain law and order during the city-wide protests.

(physics) the universal force of attraction between any pair of objects with mass

Gravity is what keeps the planets in orbit around the Sun and the Moon in orbit around the Earth.

a raised body of water that moves along the surface of a sea, river, lake, etc.

The children ran towards the shoreline, excited to play in the waves crashing on the beach.

(psychology) a strong feeling of stress or pressure

The tension before her job interview made her palms sweat.

the act of putting a weight on something

The pressure of the heavy books made the shelf bend slightly.

the ability to go back to the original form after being stretched

The elasticity of the rubber band allowed it to snap back into place.

(physics) the degree to which a substance is compacted, measured by dividing its mass by its volume

The density of water is approximately 1 gram per cubic centimeter (g/cm³).

(physics) a nuclear reaction by which the nuclei of atoms combine and form a heavier nucleus, producing nuclear energy

The sun's energy comes from hydrogen fusion into helium.

the concept that something has meaning or value only in comparison to something else

The relativity of happiness became clear, she valued health after illness.

having the possibility to develop or be developed into something particular in the future

She saw potential issues with the project and addressed them early on.

(physics) any of the smallest units that energy or matter consists of, such as electrons, atoms, molecules, etc.

Electrons are fundamental particles with a negative electric charge.

a phenomenon of attracting and repulsing forces that a moving electrical charge produces

Earth's magnetism guides compass needles toward the north pole.

happening or existing in the present time

The current economic conditions are challenging for many businesses.

total potential energy provided by a power source

This power outlet delivers 120V, but your device needs 240V.