Physics theories and laws Flashcards
Archimedes’ Principle
The upwards force on an object submerged in a fluid is equal to the weight of the fluid displaced
Newtons Second law
Force is equal to the rate of change of moment. For constant mass F=ma
Newtons First law
An object will remain at constant velocity unless an external force act upon it.
Newtons third law
If object A exerts a force on object B, object B also exerts an equal and opposite force on object A
Kirchhoff’s First law
The total current entering a junction must equal the total current leaving it.
Kirchhoff’s second law
The sum of the voltages in any closed loop must equal zero.
Stationary wave
A wave the stores but doesn’t transfer energy.
Boyle’s Law
The pressure of an ideal gas is inversely proportional to its volume when held at constant temperature.
Kepler’s First law
All planets travel in elliptical orbits around the sun
Kepler’s Second law
All planets sweep out the same area in a given period of time
Kepler’s third law
The square of a planets period is directly proportional to the cube of its mean distance from the sun
Newtons law of gravitation
The force between two masses is proportional to the product of the masses and inversely proportional to the square of the distance separating the masses.
Chandrasekhar limit
The maximum mass a white dwarf can have whilst remaining stable
Hubble’s law
The speed of a galaxy moving away from ours is proportional to the distance away from us. The constant of proportionality is Hubbles constant
Parsec
The distance at which the angle of parallax is 1 arcsecond
