THEY WILL ALL RUN OUT, DO DAMAGE TO THE ENVIRONMENT AND THEY PROVIDE MOST OF OUR ENERGY.
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NAME 4 RENEWABLE ENERGY SOURCES
THE SUN, WIND, WATER WAVES AND GEOTHERMAL
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WHAT IS A RENEWABLE ENERGY SOURCE?
THEY WILL NEVER RUN OUT, THEY DO DO DAMAGE TO THE ENVIRONMENT BUT NOT BADLY, DONT PROVIDE MUCH ENERGY AND UNRELIABLE.
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WHAT CAN BE USED TO REDUCE FRICTION?
LUBRICANTS
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HOW CAN YOU PREVENT ENERGY LOSS THOUGH HEATING OUT OF A HOUSE?
HAVE THICKER WALLS THAT ARE MADE FROM A LOW THERMAL CONDUCTIVITY AND THERMAL INSULATION.
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WHAT IS THE CONSERVATION OF ENERGY PRINCIPLE?
ENERGY CAN BE TRANSFERRED USEFULLY, STORED OR DISSIPATED, BUT CAN NEVER BE CREATED OR DESTROYED.
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WHAT IS ENERGY DISSIPATION?
WHERE NOT ALL OF THE ENERGY IS TRANSFERRED USEFULLY INTO THE STORE THAT YOU WANT.
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WHAT IS ANOTHER WORD FOR ENERGY DISSIPATION?
WASTED ENERGY AS ITS NOT ALWAYS USEFUL.
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DESCRIBE THE PROCESS WHEN CHARGING YOUR PHONE AND NAME THE DISSIPATED ENERGY.
A PHONE IS A SYSTEM SO ENERGY IS USEFULLY TRANSFERRED FROM CHEMICAL ENERGY STORE TO BATTERY IN PHONE. SOME ENERGY IS DISSIPATED IN THIS TRANSFER, TO THE THERMAL ENERGY OF THE PHONE.
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WHAT HAPPENS TO THE ENERGY DISSIPATION FOR A CLOSED SYSTEM OF A COLD SPOON BEING DROPPED INTO A INSULATED FLASK OF HOT SOUP?
ENERGY IS TRANSFERRED FROM THE THERMAL ENERGY STORE OF THE SOUP TO THE USELESS THERMAL ENERGY STORE OF THE SPOON. ENERGY TRANSFERS HAVE OCCURRED WITHIN THE SYSTEM BUT NO ENERGY HAS LEFT THE SYSTEM SO IT HAS A 0 NET CHANGE IN ENERGY.
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WHAT IS POWER?
THE RATE OF DOING WORK , I.E. HOW MUCH PER SECOND.
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WHAT IS POWER MEASURED IN?
WATTS, 1 WATT = 1 JOULE OF ENERGY TRANSFERRED PER SECOND
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WHAT IS THE EQUATION FOR POWER AND DESCRIBE IT?
P=E÷t OR P=W÷t. P- POWER, E- ENERGY TRANSFERRED, t- TIME, W- WORK DONE.
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WHAT IS A POWERFUL MACHINE?
ONE WHICH TRANSFERS A LOT OF ENERGY IN A SHORT SPACE OF TIME.
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WHAT IS CONDUCTION?
WHERE VIBRATING PARTICLES TRANSFER ENERGY T NEIGHBOURING PARTICLES.
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WHAT IS CONVECTION?
WHERE ENERGETIC PARTICLES MOVE AWAY FROM HOTTER TO COOLER REGIONS.
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THE LESS ENERGY THAT IS WASTED, THE MORE ...
EFFICIENT THE DEVICE IS SAID TO BE.
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HOW CAN YOU IMPROVE THE EFFICIENCY OF ENERGY TRANSFERS?
BY INSULATING OBJECTS, LUBRICATING THEM OR MAKING THEM MORE STREAMLINED.
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WHAT IS THE EQUATION FOR EFFICIENCY OF AN ENERGY TRANSFER?
EFFICIENCY= USEFUL OUTPUT ENERGY TRANSFER÷TOTAL INPUT ENERGY TRANSFER OR EFFICIENCY = USEFUL POWER OUTPUT÷ TOTAL POWER OUTPUT.
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Other cards in this set
Card 2
Front
WHAT IS A NON-RENEWABLE ENERGY SOURCE?
Back
THEY WILL ALL RUN OUT, DO DAMAGE TO THE ENVIRONMENT AND THEY PROVIDE MOST OF OUR ENERGY.
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