Physics foundation unit 1 4.0 / 5 based on 2 ratings ? PhysicsGCSEWJEC Created by: jessicaCreated on: 17-06-13 16:32 How can the speed of a wave be calculated? Frequency and wavelength 1 of 45 How do waves travel? Vibrations 2 of 45 What is the frequency of a wave? The number of waves. 3 of 45 What do electricity meters measure? Number of units of electricity used 4 of 45 What does the temperature increase depend on? Mass, substance and amount of energy transferred into the object 5 of 45 How do we calculate the amount of electrical energy? How much it costs to run 6 of 45 what does T mean in an equation? Time in hours 7 of 45 What does P mean in an equation? Power in kW 8 of 45 What does E mean in an equation? Energy transferred into kWh 9 of 45 What is the equation including E,P,T? E=PxT 10 of 45 How do you covert W into kW? Divide W by 1,000 to get kW 11 of 45 How do you convert seconds into hours? Divide seconds by 3600 to get hours 12 of 45 How is heat transferred? Conduction, Convection and radiation 13 of 45 Do dark matt surfaces absorb heat better or worse than light shiny surfaces? Better 14 of 45 Do all objects give out or absorb radiation? all objects give out AND absorb radiation 15 of 45 What is conduction? its heat energy which moves through a substance 16 of 45 Are Metals good at conducting heat? Yes 17 of 45 Are Non-Metals good at conducting heat? No 18 of 45 What are poor conductors of heat good for? insulating heat 19 of 45 What is convection? Liquids and Gases which transfer heat by moving from place to place 20 of 45 What happens to liquids and gasses when heated? The particles expand 21 of 45 The bigger in temperature between an object and its surroundings means what? The greater the rate at which heat energy is transferred 22 of 45 what does U-values measure? effectiveness of material as an insulator 23 of 45 the lower the U-value means what? the better the material is as a heat conductor 24 of 45 What is a cavity wall used for? insulating 25 of 45 Is it best for this? Yes 26 of 45 What does double glazing and extra insulation do for someone? reduce heat energy loss and saves money 27 of 45 What does the temperature do? measure how hot or cold something is 28 of 45 What does the heat do? measure the thermal energy contained in an object 29 of 45 What is the temperature measured in? °C 30 of 45 What is the heat measured in? J 31 of 45 What does the greater the amplitude of a sound wave mean? the louder the sound 32 of 45 What does the greater the frequency mean? the higher the pitch 33 of 45 How can white light be split? using a prism 34 of 45 Give an example of what Radio waves are used for? TV signals 35 of 45 Give an example of what micro waves are used for? Cooking, mobiles 36 of 45 Give an example of what Infra red is used for? optical fiber communication 37 of 45 Give an example of what visible light is used for? Seeing 38 of 45 Give an example of what ultraviolet is used for? detecting forged bank notes 39 of 45 Give an example of what X-rays are used for? Medical images 40 of 45 Give an example of what Gamma rays are use for? Killing cancer cells 41 of 45 How would you measure the total cost of units of electricity used? number of units x cost per unit 42 of 45 Work out if the total cost of per unit was £4.77 and the number of units was 223 £1063.71 43 of 45 Double glazing might cost £2,500 and save £100 a year. How would you figure out the pay back time? pay back time = cost of energy ÷ money saved 44 of 45 Double glazing might cost £2,500 and save £100 a year. What is the pay back time? 2,500 ÷ 100 = 25 years 45 of 45
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