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In toxicology, the median lethal dose, LD 50 (abbreviation for "lethal dose, 50%"), LC 50 (lethal concentration, 50%) or LCt 50 is a toxic unit that measures the lethal dose of a given substance. [1] The value of LD 50 for a substance is the dose required to kill half the members of a tested population after a specified test duration.
In unit systems where force is a derived unit, like in SI units, g c is equal to 1. In unit systems where force is a primary unit, like in imperial and US customary measurement systems, g c may or may not equal 1 depending on the units used, and value other than 1 may be required to obtain correct results. [2]
The Fujifilm GFX 50S II is a mirrorless medium format camera produced by Fujifilm. It features the Fujifilm G-mount. The camera, together with the X-T30 II, and some lenses, were announced by Fujifilm during the X Summit in Japan on September 2, 2021. The camera will be available for sale at the end of September 2021. [3]
We can convert a mass expressed in kilograms to the equivalent mass expressed in metres by multiplying by the conversion factor G/c 2. For example, the Sun's mass of 2.0 × 10 30 kg in SI units is equivalent to 1.5 km. This is half the Schwarzschild radius of a one solar mass black hole. All other conversion factors can be worked out by ...
≥ 50% of coarse fraction passes No.4 (4.75 mm) sieve clean sand SW well-graded sand, fine to coarse sand SP poorly graded sand sand with >12% fines SM silty sand SC clayey sand Fine grained soils 50% or more passing the No.200 (0.075 mm) sieve silt and clay liquid limit < 50 inorganic: ML silt CL lean clay organic: OL organic silt, organic clay
The ' 50s progression (also known as the "Heart and Soul" chords, the "Stand by Me" changes, [1] [2] the doo-wop progression [3]: 204 and the "ice cream changes" [4]) is a chord progression and turnaround used in Western popular music. The progression, represented in Roman numeral analysis, is I–vi–IV–V. For example, in C major: C–Am ...
The camera's 43.8x32.9 mm 2 sensor is 1.7x larger in area than that of 35 mm, built by Sony and customised by Fujifilm. [5] The crop factor compared to the 35 mm format as a reference is 0.79. [6] The camera's lens mount is the Fujifilm G-mount. [7] GFX 50S jointly won a Camera Grand Prix Japan 2017 Editors Award. [8]
Heaviside's model of a transmission line. A transmission line can be represented as a distributed-element model of its primary line constants as shown in the figure. The primary constants are the electrical properties of the cable per unit length and are: capacitance C (in farads per meter), inductance L (in henries per meter), series resistance R (in ohms per meter), and shunt conductance G ...