Flashcards in Paper 1 Deck (35):
What are the scalar quantities?
Mass, Time, Energy, Work, Length, Speed
What are the vector quantities?
Displacement, Force, Acceleration, Velocity, Momentum
What are the base units?
Kg, m, s, A, K
What is the centre of mass?
Where the weight of an object is considered to act
What is energy?
The ability to do work
What is work done?
The amount of energy transferred from one form to another
What is power?
The rate of doing work?
In an inelastic collision...
Kinetic energy isn't conserved but total energy is
Newtons 3rd law pairs...
-Act on different bodies
-Are equal magnitude
-Same type of force
What is current?
Rate of flow of charge
What is potential difference?
Work done per unit charge
What is resistance?
Resistance to the flow of charge
What is resistivity?
It is the resistance of a 1m length, 1m^2 cross sectional area, of a material
What is the E.M.F?
The energy per unit charge transferred into electric energy
What is internal resistance?
The resistance inside the cell
What is ohm's law?
When current is proportional to P.d
What is Kirchoff's 1st law?
The current entering a junction = the current leaving the junction
What is Kirchoff's 2nd law?
The total EMF around a closed loop = the sum of the P.d's across each component
When will an object move with simple harmonic motion?
When the restoring force acting on it is directly proportional to its displacement from its equilibrium
What is an induced EMF directly proportional too?
The rate of change of flux linkage
What direction is the induced EMF in?
A direction which opposes the change that caused it
High energies are required to overcome...
Why do anti-particles only survive for a fraction of a second?
They meet anti-matter an annihilate
What is thermionic emission?
Where a metal is heated given free electrons enough energy to escape
What is a baryon made of?
3 quarks or 3 anti-quarks
What are mesons made of?
A quark and an anti-quark
What are leptons?
What are the different leptons?
Electron, Muon, Tau
What is the charge on the leptons?
-1 (relative to an electron)
What is the charge on a neutrino?
What quantities are conserved?
-Strangeness (number anti-strange quarks)
-Contains a chamber of super cooled vapour
-Ions left by charged particles make the vapour condense and leave trails
-Hydrogen kept liquid form above normal boiling point at high pressure
-Pressure suddenly reduced when charged particle passes through and bubbles of gas form and show trail
Charged particles in a perpendicular magnetic field...
Will follow a curved path