4630109
Description
Flashcards by harriet baker, updated more than 1 year ago
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Created by harriet baker
about 8 years ago
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| Question | Answer |
| PHYSICS P1 | EXAM PREP |
| WHAT ARE WAVES? | WAVES ARE VIBRATIONS THAT TRANSFER ENERGY FROM PLACE TO PLACE |
| WHAT IS A WAVELENGTH? | THE WAVELENGTH OF A WAVE IS THE DIFFERENCE BETWEEN A POINT OF ONE WAVE AND THE SAME POINT ON THE NEXT WAVE. |
| WHAT IS THE UNIT OF FREQUENCY WAVE IS MEASURED IN? | HERTZ (HZ) |
| INFRARED RADIATION IS ENERGY TRANSFER BY... | ELECTROMAGNTIC WAVES |
| WHAT MATERIALS ARE THE BEST EMITTERS? | METALS |
| WHY ARE NON-METALS POOR CONDUCTORS? | THEY DONT HAVE FREE ELECTRONS |
| CONDUCTION OCCURS MAINLY IN WHAT STATE? A. SOLID B. LIQUID C. GAS | SOLID |
| WHAT IS CONVECTION? | CONVECTION IS THE CIRCULATION OF A FLUID (LIQUID OR GAS) CAUSED BY HEATING |
| ... IS WHEN A GAS TURNS INTO A LIQUID | EVAPORATION |
| WHAT ARE MICROWAVES USED FOR? | SATELLITE TV SIGNALS |
| WHAT ORDER DOES THE ELECTROMAGNETIC SPECTRUM GO IN? | 1. RADIO 2. MICROWAVE 3. INFRARED 3. VISIBLE 4. ULTRAVIOLET 5. X-RAY 6. GAMMA RAY |
| WHAT IS THE EQUATION FOR WAVE SPEED? | FREQUENCY X WAVELENGTH |
| WHAT ARE THE RENEWABLE FUELS? | 1. GEOTHERMAL ENERGY 2. HYDROELECTRIC ENERGY 3. BIOMASS ENERGY 4. TIDAL ENERGY 5. WAVE ENERGY 6. WIND ENERGY 7. SOLAR ENERGY |
| GEOTHERMAL ENERGY ADVANTAGES - RENEWABLE - NO POLLUTION - DOESNT DAMAGE THE ENVIRONMENT | DISADVANTAGES - VERY FEW PLACES IN THE WORLD YOU CAN DO THIS - COSTS A LOT OF MONEY TO DRILL DEEP INTO THE GROUND |
| HYDROELECTRIC ENERGY ADVANTAGES - RENEWABLE - NO POLLUTION - WE CAN STORE THE WATER UP | DISADVANTAGES - COSTS A LOT OF MONEY TO BUILD THE DAM - DAMS RUIN LOCAL COMUNITIES. SUCH AS KILLING PLANTS AND ANIMALS |
| BIOMASS ENERGY ADVANTAGES - RENEWABLE AS LONG AS WE KEEP PLANTING TREES - NO SPECIAL EQUIPMENT NEEDED - DOESNT ADD TO THE GREENHOUSE EFFECT | DISADVANTAGES - LARGE AMOUNT SOF LND ARE NEEDED TO GROW THE RIGHT AMOUNT OF FREES NEEDED |
| TIDAL ENERGY ADVANTAGES - RENEWABLE - NO POLLUTION NOTHING GET BURNED - RELIABLE BECAUSE THERE ARE ALWAYS TWO TIDES A DAY | DISADVANTAGES - THE DAM COSTS A LOT TO BUILD BUT CHEAP ONCE BUILT - THE DAM MAY CAUSE LOCAL FLOODING |
| WAVE ENERGY ADVANTAGES - RENEWABLE - NO POLLUTION NOTHING GETS BURNT | DISADVANTAGES - NEEDS LOTS OF MACHINES TO GET A REASONABLE AMOUNT OF ENERGY - MACHINES CAN LOOK UGLY - MACHINES CAN BE DAMAGED BY STORMS - MACHINES COST A LOT |
| WING ENERGY ADVANTAGES - RENEWABLE - NO POLLUTION NOT GETS BURNED - TURBINES ARE QUITE CHEAP SO USED IN POORER COUNTRIES | DISADVANTAGES - TURBINES CAN BE UGLY AND NOISY - ONLY WORKS IF ITS QUITE WINDY - IF THE WIND STOPD YOU GET NO ENERGY |
| SOLAR ADVANTAGES - RENEWABLE - NO POLLUTION NOTHING GETS BURNED | DISADVANTAGES - SOLAR CELLS AND SOLAR PANELS ARE REALLY EXPENSIVE - ONLY WORKS IF ITS SUNNY |
| WHITE LIGHT CONTAINS ALL THE COLOURS ON THE SPECTRUM? TRUE OR FALSE? | TRUE |
| WHAT IS A SOLAR CELL? | ELECTRICAL CELL THAT PRODUCES A VOLTAGE WHEN IN SUNLIGHT SOLAR CELLS ARE NORMALLY CONNECTED TOGETHER IN SOLAR CELL PANELS. |
| WHAT TO WORK OUT THE EFFICIENCY? | USEFUL ENERGY INPUT / TOTAL ENERGY OUTPUT |
| WHAT IS THE RED SHIFT? | THE LIGHT WAVES ARE STRETCHED OUT IF THE STAR OR GALAXY IS MOVING AWAY FROM US. THE WAVE LENGTH OF TIME WAVES IS INCREASED. |
| WHAT IS THE BLUE SHIFT? | THE LIGHT WAVES ARE SQUASHED TOGETHER IF THE STAR OR GALAXY IS MOVING TOWARDS US. THE WAVELENGTH OF THE WAVES IS REDUCED. |
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