Quick Answer: A seismograph feels the Earth’s shake by using a suspended mass that stays still while the ground moves beneath it. These…

Quick Answer: MRI machines use powerful magnets and radio waves to make detailed images of the inside of the body. They work by…

Quick Answer: Submarines control their buoyancy — the force that makes them float or sink — using specially designed tanks that can hold…

Quick Answer: QR codes are like pixelated puzzle squares that store information in patterns of black and white modules. Your phone’s camera or…

Quick Answer: Airbags are part of a car’s safety restraint system, designed to inflate in fractions of a second during certain collisions. They…