Search results
Results From The WOW.Com Content Network
Symbol Name Meaning SI unit of measure nabla dot : the divergence operator often pronounced "del dot" per meter (m −1) : nabla cross : the curl operator often pronounced "del cross"
The Northrop F-5 is a family of supersonic light fighter aircraft initially designed as a privately funded project in the late 1950s by Northrop Corporation.There are two main models: the original F-5A and F-5B Freedom Fighter variants, and the extensively updated F-5E and F-5F Tiger II variants.
In physics, a fifth force refers to a hypothetical fundamental interaction (also known as fundamental force) beyond the four known interactions in nature: gravitational, electromagnetic, strong nuclear, and weak nuclear forces. Some speculative theories have proposed a fifth force to explain various anomalous observations that do not fit ...
A-F shell stars ranging from A0 to F5. The vast majority of known shell stars are of spectral class B. However, partly because of this many cooler shell stars have remained undetected. [1] The Be phenomenon, and hence the term Be star itself, is now widely applied to similar stars not only of spectral class B, but also A and sometimes O and F.
The old scale lists an F5 tornado as wind speeds of 261–318 mph (420–512 km/h), while the new scale lists an EF5 as a tornado with winds above 200 mph (322 km/h), found to be sufficient to cause the damage previously ascribed to the F5 range of wind speeds.
According to the 2022 Particle Physics Review, the charmed quark has a mass of 1.27 ± 0.02 GeV/c 2, [b] a charge of + 2 / 3 e, and a charm of +1. [10] The charm quark is more massive than the strange quark: the ratio between the masses of the two is about 11.76 +0.05 −0.10. [10] The CKM matrix describes the weak interaction of quarks ...
WN/C – WN stars plus strong C IV lines, intermediate between WN and WC stars [40] WC [40] – spectrum with strong C II-IV lines WCE (WC4 to WC6) – hotter or "early" WCL (WC7 to WC9) – cooler or "late" WO (WO1 to WO4) – strong O VI lines, extremely rare, extension of the WCE class into incredibly hot temperatures (up to 200 kK or more)
In physics, a force is considered a vector quantity. This means that it not only has a size (or magnitude) but also a direction in which it acts. We typically represent force with the symbol F in boldface, or sometimes, we place an arrow over the symbol to indicate its vector nature, like this: .