CCEA Physics A2 Unit 1 Definitions

Question	Answer
Momentum	a property given to a mass that is moving; the product of a body's mass and velocity
Principle of conservation of momentum	If no external forces are acting, the total momentum of a system of colliding bodies is constant.
Elastic	A collision in which KE is conserved
Inelastic	A collision in which KE is not conserved
Boyle's Law	Fixed mass of gas at constant temp: volume is inversely proportional to pressure
Charles' Law	Fixed mass of gas at constant pressure: volume is directly proportional to absolute temp.
Pressure Law	Fixed mass of gas with constant volume: pressure directly proportional to absolute temperature
Specific Heat Capacity	The quantity of heat energy required to raise 1kg of a material by 1K
Simple Harmonic Motion	Any object that is displaced from a stable equilibrium will oscillate. The acceleration of this object will be: - In the direction of the equilibrium - proportional to the displacement
Half Life	The time taken for the activity of a material to fall to half its original value
Binding Energy	Energy that holds a nucleus together
Binding energy per nucleon	average energy required to remove a single neutron from a nucleus
Critical Size	The size of fuel assembly required which is just capable of sustaining a chain reaction within it.

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	Created by pmce1997 about 10 years ago