Reference Terms
from Wikipedia, the free encyclopedia
Altimeter
An altimeter is an active instrument used to measure the altitude of an object above a fixed level.
Note: The above text is excerpted from the Wikipedia article "Altimeter", which has been released under the GNU Free Documentation License.
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Matter & Energy News
May 17, 2025
May 14, 2025 — A new study achieves unprecedented accuracy in modelling extreme cosmic events like black hole and neutron star collisions by calculating the fifth post-Minkowskian (5PM) order, crucial for interpreting gravitational wave data from current and ...
May 8, 2025 — In space, energetic neutrinos are usually paired with energetic gamma rays. Galaxy NGC 1068, however, emits strong neutrinos and weak gamma rays, which presents a puzzle for scientists to solve. A new paper posits that helium nuclei collide with ...
May 8, 2025 — A new study of the 28 most populous U.S. cities finds that all are sinking to one degree or another. The cities include not just those on the coasts, where relative sea level is a concern, but many in the interior. Furthermore, using newly granular ...
May 7, 2025 — Physicists captured the first images of individual atoms freely interacting in space. The pictures reveal correlations among the 'free-range' particles that until now were predicted but never directly ...
Latest Headlines
updated 12:56 pm ET
May 16, 2025 — Newly discovered weapons of bacterial self-defense take different approaches to achieving the same goal: preventing a virus from spreading through the bacterial ...
May 16, 2025 — Millions of years of evolution have enabled some marine animals to grow complex protective shells composed of multiple layers that work together to dissipate physical stress. In a new study, ...
May 16, 2025 — New research details how infrared thermography, high-definition imaging and neural network analysis can combine to make concrete bridge inspections ...
May 16, 2025 — Janus heterobilayers -- dual-sided materials with unique properties -- may be the key to efficiently creating clean hydrogen ...
May 16, 2025 — Researchers have designed a high-performance, open-access continuous flow process to safely produce key antibacterial drugs from bio-based ...
May 15, 2025 — A new gene editor may soon open the door to gene therapies for a wider array of ...
May 15, 2025 — A new study explores how EOS transmits ultrashort laser pulses through crystals that change in response to an applied electric field. This technique allows researchers to accurately capture the shape ...
May 15, 2025 — Whether bismuth is part of a class of materials highly suitable for quantum computing and spintronics was a long-standing issue. Research has now ...
May 15, 2025 — In Project Chimera, a game lab combines a VR computer game with educational problems in order to convey scientific content in a motivating ...
May 15, 2025 — Charge transfer, or the movement of electrons, can occur either within a molecule or between two molecules. Combining the two types of charge ...