Do cyanide pills kill as quickly as in the movies? Perhaps. If it is the right kind of cyanide, it can kill in about 2 to 5 minutes. There are several different types of cyanides and they can be found in liquid, solid, or gas form. Cyanide is a group of chemicals that have a […]
#332 Do cyanide pills kill as quickly as in the movies? Read More »
Can we cover the Sahara Desert in solar panels? Technically, yes. Practically, no. The Sahara Desert is the largest hot desert in the world. It covers 9.2 million km2, which would make it the fifth largest country in the world, if it were a country. It is one of the most exposed areas on Earth
#330 Can we cover the Sahara Desert in solar panels? Read More »
Why do we get hot when we exercise? Because heat is a byproduct of the process muscles use to make energy. Let’s look at how we get energy to our muscles. We are unable to make our own energy, we can only convert one energy source into another. We have to eat plants or animals
#328 Why do we get hot when we exercise? Read More »
Could a Formula One car drive upside down? Technically yes, but it might need some modifications. Formula One racing cars are some of the fastest cars in the world. The fastest speed ever reached in a Formula One car is 397.36 km/h. This is not as fast as the land speed world record, which is
#326 Could a Formula One car drive upside down? Read More »
Why do some liquids burn and others don’t? Some liquids require less energy to get the chemical reaction over the activation energy barrier. What is fire? Fire is the process of combustion and is a chemical reaction. Fire needs three things to happen: a fuel source, heat, and oxygen. If you remove one of these,
#325 Why do some liquids burn and others don’t? Read More »
How do chemotherapy and radiotherapy work? Chemotherapy works by damaging the DNA inside the nucleus of the cancer cells and stopping them dividing. Radiotherapy works by targeting the cancer directly and damaging its DNA. How does cancer form? As our cells age, they die and new cells replace them. Some cells are replaced more quickly
#323 How do chemotherapy and radiation therapy work? Read More »
How does a pressure cooker work? By using high pressure to raise the boiling point of the water. Pressure cookers were invented in 1679 by a French physicist. He was trying to find a way to cook food faster. Cast iron pressure cookers were made in Germany in 1864. Pressure cookers improved through the early
#321 How does a pressure cooker work? Read More »
How does a refrigerator cool food? By transferring the heat from inside the refrigerator to outside using evaporation. Fresh foods have to be kept cool to make them last longer. As soon as they are opened, or cut, bacteria start to decompose them. When foods decompose, they taste bad, but some bacteria can produce toxins
#320 How does a refrigerator cool food? Read More »
Why does metal spark in a microwave oven? The microwave charges one side of the metal positively and one side negatively. This charge can ionize the air, making sparks. First, we need to look at what microwaves are. A microwave is a type of electromagnetic radiation. Electromagnetic radiation is energy that moves in waves and
#319 Why does metal spark in a microwave oven? Read More »
How does a steam engine work? By taking the energy contained in coal and making heat. Then using the heat to turn water into steam and using the steam to push and pull a piston. The steam engine was the invention that helped push the Industrial Revolution. However, the knowledge of steam power has been
#316 How does a steam engine work? Read More »
