Physical Science - Exam 1a

Front

What is spontaneous emission?

Back

The process where an electron in an excited state releases a photon and drops to a lower energy level without external influence.

Front

What is output in the context of machines?

Back

The force or work produced by a machine after it has multiplied the input force.

Front

What is displacement?

Back

A vector quantity that refers to the change in position of an object, measured from the initial to the final position.

Front

What is acceleration?

Back

The rate of change of velocity of an object, indicating how quickly an object is speeding up or slowing down.

Front

What are UVB rays?

Back

Ultraviolet B rays are a type of ultraviolet radiation that is mostly blocked by the Earth's atmosphere and can cause skin damage.

Front

What is the difference between distance and displacement?

Back

Distance is a scalar quantity representing the total path length traveled, while displacement is a vector quantity that measures the shortest path from the initial to the final position.

Front

What is momentum?

Back

A measure of the motion of an object, calculated as the product of its mass and velocity.

Front

What is the principle of conservation of energy?

Back

Energy cannot be created or destroyed, only transformed from one form to another.

Front

What is a wave?

Back

A disturbance that transfers energy through space or matter, characterized by its wavelength, frequency, and amplitude.

Front

What is the electromagnetic spectrum?

Back

The range of all types of electromagnetic radiation, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.