PHYSICS PAPER 1 EQUATION FLASHCARDS
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33 Terms
ENERGY LOST FROM THE GRAVITATIONAL POTENTIAL ENERGY STORE OF A FALLING OBJECT=
ENERGY GAINED IN THE KINETIC ENERGY STORE
KINETIC ENERGY=
0.5 X MASS X SPEED²
GRAVITATIONAL POTENTIAL ENERGY=
MASS X HEIGHT X GRAVITATIONAL FIELD STRENGTH
ELASTIC POTENTIAL ENERGY=
O.5 X SPRING CONSTANT X EXTENSION²
WHAT IS SPECIFIC HEAT CAPACITY?
THE AMOUNT OF ENERGY NEEDED TO RAISE THE TEMPERATURE OF AN OBJECT BY 1 DEGREE
CHANGE IN THERMAL ENERGY=
SPECIFIC HEAT CAPACITY X TEMPERATURE X MASS
WHAT IS THE LAW OF CONSERVATION ENERGY?
ENERGY CANNOT BE CREATED OR DESTROYED BUT ONLY TRANSFERRED
WHAT IS WASTED ENERGY?
THE ENERGY THAT DISSIPATES WHEN AN ENERGY TRANSFER TAKES PLACE THAT IS NOT USEFUL
POWER=
ENERGY TRANSFERRED/ TIME
WHAT IS CONDUCTION?
WHEN VIBRATING PARTICLES TRANSFER ENERGY TO NEIGBOURING PARTICLES
-ONLY IN SOLIDS
WHAT IS THERMAL CONDUCTIVITY?
HOW QUICKLY ENERGY IS TRANSFERRED THROUGH A MATERIAL
WHAT IS CONVECTION?
WHERE ENERGETIC PARTICLES MOVE FROM HOTTER TO COOLER REGIONS
EFFICIENCY=
USEFUL OUTPUT ENERGY TRANSFER/TOTAL INPUT ENERGY TRNASFER
EFFECTS OF RENEWABLE ENERGY PROS AND CONS
-ENVIRONMENTAL POLLUTION
-VISUAL POLLUTION
-NOISE POLLUTION
-RESPONSIVENESS TO DEMAND
-COSTS
-RELIABILITY
-EFFECT ON HABITATS AND ONGOERS
CHARGE FLOW=
CURRENT X TIME
POTENTIAL DIFFERENCE=
CURRRENT X RESISTANCE
WHAT IS THE UK MAINS SUPPLY?
230V
WHAT IS THE FREQUENCY OF THE MAINS SUPPPLY?
50HZ
WHAT IS DIRECT POTENTIAL DIFFERENCE?
A CONSTANT POTENTIAL DIFFERENCE THAT ALWAYS FLOWS IN THE SAME DIRECTION
ENERGY TRANSFERRED =
POWER X TIME
POWER=
POTENTIAL DIFFERENCE X CURRENT
POWER =
CURRENT² X RESISTANCE
ENERGY TRANSFERRED=
CHARGE FLOW X POTENTIAL DIFFERENCE
DENSITY=
MASS/VOLUME
WHAT IS INTERNAL ENERGY?
KINETIC + POTENTIAL ENERGY
WHEN A SUBSTANCE CHANGES STATE WHAT HAPPENS?
ENERGY IS PUT IN TO BREAK THE INTERMOLECULAR FORCES BUT NOT TO INCREASE THE TEMPERATURE SO INTERNAL ENERGY STILL RISES
WHAT IS SPECIFIC LATENT HEAT?
THE AMOUNT OF ENERGY NEEDED TO CHANGE 1KG OF IT FROM ONE STATE TO ANOTHER WITHOUT CHANGING ITS STATE
WHAT IS THE SPECIFIC LATENT HEAT FOR SOLID TO LIQUID?
SPECFIC LATENT HEAT OF FUSION
WHAT IS THE SPECIFIC LATENT HEAT FOR LIQUID TO GAS?
SPECIFIC LATENT HEAT OF VAPOURISATION
ENERGY=
MASS X SPECIFIC LATENT HEAT