All music is a study in physics; from the vibration in a singer's vocal cords, to the resonance of vibrating air in a violin, to the electrical signals from a computer that become a hip-hop beat. The electric guitar takes the cake, converting one type of energy into another, amplifying an electrical signal, and converting the energy back to sound. Learn how a simple strum turns into a booming electric guitar sound in the module below.
Atomic energy exists in fixed amounts called "quanta." As an atom's electrons move up and down in energy, they absorb these quanta of energy from the environment or emit it back out into the environment. Lasers work by directing these random absorptions and emissions of quanta into an orderly beam. Click the buttons below to learn exactly how lasers do it!
North Carolina Has Big Decisions Coming in the Future of Emissions and Offshore Energy
October 26, 2015
Think you know what it takes to fly a hexacopter?
Play this simulation to learn how force, torque and angular momentum all help hexacopters hover, move and turn.
I am the first to admit that I have never gotten the holidays quite right. Whether I’m late shopping for gifts, mess up my contribution to dinner, do something embarrassing at a holiday party or hang all the decorations crooked, something always seems to go wrong.
Thankfully, there are a few sciencey tricks people like me can bust out around the holidays as a last ditch effort to spread a little holiday cheer... And promptly gather it up again when explaining exactly how it works.