Science - World Scholars Cup Latest Version Graded A+

Science - World Scholars Cup Latest Version Graded A+ Batteries Cathode, Electrolyte, Anode (Top to bottom). Creates energy through attraction of charges Discharge Converts chemical energy to electrical energy Wireless Charging Uses electromagnetic field that sends electrodes to the battery. Done through two induction coils, one on each device. Electrodes travel from one coil to another Exploding Batteries Explodes due to overheating a small filament. Most likely are Lithium batteries Silicon Anode Can store 20x more charge than normal batteries Lithium Metal Can charge more but can explode Bacteria Battery Uses EXO electrogens (Bacteria) to get energy. Harness the energy through paper. Energy from cellular respiration. Direct Current Current flows none stop left to right Alternate Current Current flows forward then stops a little repeated. Better for long distance British Plugs Due to low copper from ww2 changed plugs to use less copper Air Conditioning Uses liquid to cool down air that is then sent out afterwards Heating Takes air from outside, heats it over chemical "propane" and sends out air again. Which is worse, Heating or Cooling? Heating as accounts for 7 - 10% of greenhouse gasses Air Purifier Takes in air and removes dust and particles Activated Carbon (Air Purifier Method) Removes dust through magnetic from the air Ionizing Purifier Makes dust stick to ground and out of air Foldimate Takes care of cleaning and folding clothes, releases in 2020 Vaccum Cleaner Invented in 1860, sucks up dust using centrifugal separation Dishwashers Spraying hot water on a grid to clean dishes. First invented in 1850 Home Robots Automated Machinery that assist in house work Microwaves Uses electro magnetic radiation to heat up water molecules in food Toasters Heats up a metal grid and toasts the bread. Uses 80/20 Nichrome for the metal Convection Oven Uses a fan to circulate hot air over food The Rice Cooker Has a thermostat and timer to cook rice without human interaction Coffee Machine (Electric Drip Brewer) Water is heated up and pushed through a chamber that is filled with ground coffee.