Graphene structure. One-atom-thick sheets of carbon known as graphene are promising materials in nanotechnology for applications ranging from electronics to medicine. (Credit: Bumbasor/iStockphoto/Getty Images)
Typical variation of lift coefficient (CL), drag coefficient (CD), and lift-to-drag ratio (L/D) for an airfoil as functions of angle of attack (α). Insets show physical nature of the flow field over the wing at the indicated points on the lift curve.
Aboard the International Space Station, NASA astronaut Steve Swanson harvests a crop of red romaine lettuce. This and other plant varieties have been grown in the station's Vegetable Production System (Veggie), for space biology experiments as well…
Relative gravity meters. (a) Mass suspended by a spring whose position is monitored electronically. (b) Mass connected to the instrument frame by a hinged beam, with the spring oriented diagonally. (LaCoste & Romberg)