Physics General Relativity Study guides, Class notes & Summaries

Force/Area - ANSWER-Pressure = Pascals or N/cm2 - ANSWER-What is the unit of pressure? Newtons - ANSWER-What is the unit of force? Metres squared - ANSWER-What is the unit of area? Increase the force or reduce the area the force acts upon - ANSWER-How would you increase pressure? Decrease the force or increase the area the force acts upon - ANSWER-How would you decrease the pressure? Because they are both capable of flowing - ANSWER-Why are liquids and gases called fluids? T...

What is work? - ANSWER-the product of the force along the direction of displacement and the magnitude of the displacement Can work be stationary? - ANSWER-NO What is the SI unit of work? - ANSWER-joules (J) Is work a scalar? - ANSWER-YES (magnitude only) no force= no ________ - ANSWER-movement force and displacement are parallel - ANSWER-W= F*d force and displacement are antiparallel - ANSWER-W= -F*d force and displacement are at an angle - ANSWER-W= F*d*cos O force and d...

Potential Energy - ANSWER-Stored energy, PE=mg (change in) h in Joules Kinetic Energy - ANSWER-energy of a moving object KE=1/2mv^2 in Joules Energy - ANSWER-the ability to do work Work - ANSWER-release of Energy in moving an object, force exerted thru a distance w=Fd in Joules Power - ANSWER-(a rate) work done in a certain amount of time P=W/t in Watts (W) A crate is pushed with a force of 100 N across a distance of 10 meters. How much work is done on the crate? How much power is...

Reference point - ANSWER-a visible object to which you can compare the change of distance to a moving object Speed - ANSWER-distance an object travels per unit of time. Average speed - ANSWER-total distance an object travels divided by the total time it takes to travel that distance, speed=distance/time Instantaneous speed - ANSWER-speed of an object at a given point in time. Velocity - ANSWER-the speed and direction of a moving object, can change with change in speed and/or directio...

Mass - ANSWER-kilogram (kg) Time - ANSWER-seconds (s) Speed - ANSWER-meters per second (m/s) Velocity - ANSWER-meters per second (m/s) Average velocity - ANSWER-meters per second (m/s) Initial velocity - ANSWER-meters per second (m/s) Final velocity - ANSWER-meters per second (m/s) Acceleration - ANSWER-meters per second squared (m/s^2) Force - ANSWER-Newtons (N) Net force - ANSWER-Newtons (N) Distance - ANSWER-meters (m) Displacement - ANSWER-meters (m) Momen...

What is Momentum? - ANSWER-Mass x Velocity p = mv State Newton's Second Law of motion (A2 definition) - ANSWER-Resultant Force is proportional to the rate of change of momentum and in the same direction What are the two units of momentum? - ANSWER-kgms^-1 Ns What is Impulse? - ANSWER-Force x time Change in momentum What is the equation for the conservation of linear momentum? - ANSWER-m1u1 +m2u2 = m1v1 +m2v2 Describe the law of conservation of linear momentum - ANSWER-In all c...

Acceleration - ANSWER-the rate at which velocity changes Agent - ANSWER-a natural force or object producing or used for obtaining specific results Archimedes' Principle - ANSWER-the rule that the buoyant force on an object is equal to the weight of fluid the object displaces Balanced Force - ANSWER-upward force exerted by a fluid on a submerged object Center of gravity - ANSWER-the point in an objet where the force of gravity appears to act Centripetal force - ANSWER-force that c...

length - ANSWER-meter (m) mass - ANSWER-kilogram (kg) time - ANSWER-second (s) electric current - ANSWER-ampere (A) thermodynamic temperature - ANSWER-kelvin (K) amount of a substance - ANSWER-mole (mol) luminous intensity - ANSWER-candela (cd) area - ANSWER-square meter (m²) volume - ANSWER-cubic meter (m³) speed (velocity) - ANSWER-meter per second (m/s) acceleration - ANSWER-meter per second squared (m/s²) mass density - ANSWER-kilogram per cubic meter (kg/...

physics - ANSWER-the most basic science that examines the fundamental laws relating matter and energy and is called the "mother" of all sciences. hypothesis - ANSWER-an educated guess that is not fully accepted until demonstrated by experiment. theory - ANSWER-a synthesis of a large body of information that encompasses well-tested and verified hypotheses about certain aspects of the natural world. force - ANSWER-a push or pull net force - ANSWER-combination of all forces on an obje...

How do work out a gradient of a line - ANSWER-Rise over run A.K.A how high how far How do you work out the energy needed to heat an object - ANSWER-Specific heat capacity mass change in temperature --- kg J/kg •c How do you work out the specific heat capacity of an object - ANSWER-Energy needed mass Which electromagnetic wave emits the least energy - ANSWER-Radiowaves Which electromagnetic wave emits the most energy - ANSWER- Which electromagnetic wave has the shortest wa...