Airbags
An automobile airbag is a safety device: its sole purpose is to prevent an occupant of the vehicle from impacting with the surrounding structure. Typically, in a collision, Newton's laws of motion tend to be obeyed very well. Of particular concern is the law…
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Biology
Bioenergy Basics
Biomass (organic matter) can be used to provide heat, make fuels, and generate electricity. This is called…
Mathematics
Kepler's Conjecture
Take a bunch of oranges that are similar in size and try to pack them into a cardboard box. What is the most…
Astronomy
Pluto Is Way Out There
Long considered to be the smallest, coldest, and most distant planet from the Sun, Pluto may also be the…
Engineering
Cool Fuel Cells
Astronauts have been using them for power aboard spacecraft since the 1960s. Soon, perhaps, they'll be just as…