Science - World Scholars Cup exam 2024 with 100% correct answers
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Course
Science - World Scholars Cup
Institution
Science - World Scholars Cup
Batteries correct answersCathode, Electrolyte, Anode (Top to bottom). Creates energy through attraction of charges
Discharge correct answersConverts chemical energy to electrical energy
Wireless Charging correct answersUses electromagnetic field that sends electrodes to the battery. Done thro...
Batteries correct answersCathode, Electrolyte, Anode (Top to bottom). Creates energy through attraction
of charges
Discharge correct answersConverts chemical energy to electrical energy
Wireless Charging correct answersUses 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 correct answersExplodes due to overheating a small filament. Most likely are Lithium
batteries
Silicon Anode correct answersCan store 20x more charge than normal batteries
Lithium Metal correct answersCan charge more but can explode
Bacteria Battery correct answersUses EXO electrogens (Bacteria) to get energy. Harness the energy
through paper. Energy from cellular respiration.
Direct Current correct answersCurrent flows none stop left to right
Alternate Current correct answersCurrent flows forward then stops a little repeated. Better for long
distance
British Plugs correct answersDue to low copper from ww2 changed plugs to use less copper
Air Conditioning correct answersUses liquid to cool down air that is then sent out afterwards
, Heating correct answersTakes air from outside, heats it over chemical "propane" and sends out air again.
Which is worse, Heating or Cooling? correct answersHeating as accounts for 7 - 10% of greenhouse
gasses
Air Purifier correct answersTakes in air and removes dust and particles
Activated Carbon (Air Purifier Method) correct answersRemoves dust through magnetic from the air
Ionizing Purifier correct answersMakes dust stick to ground and out of air
Foldimate correct answersTakes care of cleaning and folding clothes, releases in 2020
Vaccum Cleaner correct answersInvented in 1860, sucks up dust using centrifugal separation
Dishwashers correct answersSpraying hot water on a grid to clean dishes. First invented in 1850
Home Robots correct answersAutomated Machinery that assist in house work
Microwaves correct answersUses electro magnetic radiation to heat up water molecules in food
Toasters correct answersHeats up a metal grid and toasts the bread. Uses 80/20 Nichrome for the metal
Convection Oven correct answersUses a fan to circulate hot air over food
The Rice Cooker correct answersHas a thermostat and timer to cook rice without human interaction
Coffee Machine (Electric Drip Brewer) correct answersWater is heated up and pushed through a
chamber that is filled with ground coffee.
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