#700 How does a helicopter with two rotors work?
How does a helicopter with two rotors work? The rotors rotate in opposite directions and are on a transmission so that they […]
#699 Why does a boomerang come back?
Why does a boomerang come back? One wing travels faster than the other which causes it to fly in a circular path. […]
#698 What is a nerve?
What is a nerve? They are bundles of nerve fibers called axons that connect neurons. They look like cables. Their job is […]
#697 What are rare earth metals?
What are rare earth metals? They are a group of 17 elements on the periodic table that are spread out so much […]
#696 Why aren’t there flying boats anymore?
Why aren’t there flying boats anymore? Because landing and takeoff is rough, they are not very stable, engines became more powerful, more […]
#695 Why do British people say football and Americans say soccer?
Why do British people say football and Americans say soccer? Britain used to call football soccer until about 1980 when they started […]
#694 Are symbiotic relationships always beneficial to both parties?
Are symbiotic relationships always beneficial to both parties? No, they aren’t. There are mutualistic, commensalistic, and parasitic symbiotic relationships. The word symbiosis […]
#693 Why are electromagnets stronger than permanent magnets?
Why are electromagnets stronger than permanent magnets? Because the amount of current and the number of coils in the copper wire can […]
#692 How thick is tank armor?
How thick is tank armor? It depends on the tank, the type of armor, and the location on the tank, but armor […]
#691 What causes a heat wave?
What causes a heat wave? It is caused when high-pressure air traps a layer of heat near the surface of the Earth […]