#327 What is a central bank?
What is a central bank? It is an institution that manages the currency of a country and controls the supply of money. […]
#326 Could a Formula One car drive upside down?
Could a Formula One car drive upside down? Technically yes, but it might need some modifications. Formula One racing cars are some […]
#325 Why do some liquids burn and others don’t?
Why do some liquids burn and others don’t? Some liquids require less energy to get the chemical reaction over the activation energy […]
#324 Could penguins fly in the past?
Could penguins fly in the past? Yes, they could, but millions of years ago. There are many birds that could fly at […]
#323 How do chemotherapy and radiation therapy work?
How do chemotherapy and radiotherapy work? Chemotherapy works by damaging the DNA inside the nucleus of the cancer cells and stopping them […]
#322 Why do dragonflies have four wings?
Why do dragonflies have four wings? So that they can hover and fly in any direction that they wish. Most insects have […]
#321 How does a pressure cooker work?
How does a pressure cooker work? By using high pressure to raise the boiling point of the water. Pressure cookers were invented […]
#320 How does a refrigerator cool food?
How does a refrigerator cool food? By transferring the heat from inside the refrigerator to outside using evaporation. Fresh foods have to […]
#319 Why does metal spark in a microwave oven?
Why does metal spark in a microwave oven? The microwave charges one side of the metal positively and one side negatively. This […]
#318 How long has the Sahara been a desert?
How long has the Sahara been a desert? Possibly for 4.6 million years, but maybe as long as 7 million years., The […]