Ocr Gcse (91) Physics A (Gateway Science) J249/03 Paper 3 Higher Tier June 2023 Question Paper

What is a solar day? {Ans: A rotation of 361 degrees which takes 24 hours. This is the time taken to face the sun again, and therefore appear in the same position - E.G midday}What is the speed of light in a vacuum? {Ans: 300,000 km/s or 300,000,000 m/s.}What is the source of the Sun's energy? {Ans: Fusion of hydrogen nuclei.}Ray diagrams: Any other ray that is parallel to the other rays will do what? {Ans: Refract onto the point where the image is focused}What does a nucleus use gamma radiation for? {Ans: To get rid of extra energy}What is the radioactive zone? {Ans: Very hot, so energy is transferred via radaiation}Convert 0 kelvin to 0 degrees {Ans: 0 kelvin = -273 degrees celcius 0 degrees celcius = 273 degrees kelvin}What is a sidereal day? {Ans: A rotation of 360 degrees which takes 23 hours and 56 minutes, where you will always be looking at the same patch of sky. the time taken for the earth to complete one full rotation}Give the order of events in a power station to the national grid {Ans: Furnace Boiler Turbines Generator Transformer National Grid}What