Physics

Alpha particle is the nucleus of an atom of Helium.

In case of uniform circular motion, the acceleration is variable in magnitude but constant in direction.

An atomic clock is a clock device that uses an electronic transition frequency in the microwave, optical, or ultraviolet region of the electromagnetic spectrum of atoms as a frequency standard for its timekeeping element. Atomic clocks are the most accurate time and frequency standards known, and are used as primary standards for international time distribution services, to control the wave frequency of television broadcasts, and in global navigation satellite systems such as GPS.

The lift of an aeroplane is caused by Bernouli’s theorem.