Measurement of Temperature A thermometer is any device that is used to measure temperature Each type of thermometer uses a physical property of a material that varies with temperature - examples of...
Defining Thermal Equilibrium Thermal energy is?always?transferred from a hotter region to lower region Thermal equilibrium is defined as: When two substances in physical contact with each other no ...
Thermal Energy Transfer The conservation of energy states that energy is never created or destroyed, only transferred from one form to another When a thermometer is placed in a beaker of boiling wa...
Gravitational Potential Energy Between Two Point Masses The gravitational potential energy (G.P.E) at point in a gravitational field is defined as: The work done in bringing a mass from infinity to...
Gravitational Potential The gravitational potential energy (G.P.E) is the energy an object has when lifted off the ground given by the familiar equation: G.P.E = mgΔh The G.P.E on the surface of th...
The Value of g on Earth Gravitational field strength?g?is approximately constant for small changes in height near the Earth’s surface (9.81 m s-2) This is because from the inverse square law relati...
Deriving Gravitational Field Strength (g) The gravitational field strength at a point describes how strong or weak a gravitational field is at that point The gravitational field strength due to a p...
Geostationary Orbits Many communication satellites around Earth follow a?geostationary orbit This is a specific type of orbit in which the satellite: Remains directly above the equator, therefore, ...
Circular Orbits in Gravitational Fields Since most planets and satellites have a near circular orbit, the gravitational force?FG?between the sun or another planet provides the?centripetal force?nee...
