#388 How do metal detectors work?
How do metal detectors work? Metal detectors work by transmitting an electromagnetic field that energizes any metal near it. There are three […]
#387 What is the smallest thing an electron microscope can see?
What is the smallest thing an electron microscope can see? An electron microscope can see atoms that are 0.05 nanometers long. 0.05 […]
#386 How does body armor work?
How does body armor work? By breaking up the bullet and removing its kinetic energy. Armor has been around for a long […]
#385 Why do mosquito bites itch?
Why do mosquito bites itch? Mosquito and insect bites itch because the immune response is triggered after the mosquito finishes biting. There […]
#384 What is chewing gum made of and what happens if you swallow it?
What is chewing gum made of and what happens if you swallow it? These days, chewing gum is just a gum base […]
#383 How do LED lights produce different colors?
How do LED lights produce different colors? By using different materials that produce light at different wavelengths. LED stands for Light Emitting […]
#382 When did we start using tarmac (asphalt) on roads?
When did we start using tarmac on roads? Tarmac (asphalt) only really became popular once the motorcar was invented. Once you know […]
#381 Why is glass transparent?
Why is glass transparent? Glass is transparent because light photons don’t have enough energy to excite the molecules in the glass. There […]
#380 How quickly are the continents moving apart?
How quickly are the continents moving apart? Our continents are moving apart at a rate of 2.5 cm every year. The surface […]
#379 Can the Mona Lisa ever be sold?
Can the Mona Lisa ever be sold? The Mona Lisa, by Leonardo da Vinci, can never be sold because it is owned […]