Articles by David Appell
Phys.org / Researchers quantify the onset of turbulence in a pipe bent back on itself
How much stress do pipes undergo when a liquid flows through them, and how does it depend on the degree of curvature of the pipe?
Phys.org / Riding a laser to Mars
Could a laser send a spacecraft to Mars? That's a proposed mission from a group at McGill University, designed to meet a solicitation from NASA. The laser, a 10-meter wide array on Earth, would heat hydrogen plasma in a chamber ...
Phys.org / Levitating and colliding liquid drops
If you've seen water drops dance and jitter on a hot pan or griddle, you've seen the Leidenfrost effect in action. Or you may have seen the "Mythbusters" episode where Adam and Jamie thrust their wet fingers and hands into ...
Phys.org / Controlling self-doping in magnetite with temperature
One of the most abundant iron-containing minerals on Earth, and also the oldest known magnetic material, is magnetite, Fe3O4. Magnetite has applications in many fields, such as the study of paleomagnetism—magnetism in rocks ...
Phys.org / The earliest atmosphere on Mercury
Mercury is a most unusual planet. The smallest planet in the solar system, and the closest planet to the sun, it is in a 3:2 spin resonance, slowly turning and experiencing scorching heat up to 430 degrees Celsius, and the ...
