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It is calculated as = / = /, where is the incidence in the exposed group, is the incidence in the unexposed group, and is the relative risk. [2] It is used when an exposure increases the risk, as opposed to reducing it, in which case its symmetrical notion is preventable fraction among the unexposed .
The OTRAG rocket was a modular satellite-delivery rocket developed by the OTRAG company in the 1970s and 80s. [1] [2] [3] The OTRAG rocket was to become a rocket built up from several mass-produced units, intended to carry satellites with a weight of 1-10 tons or more into orbit.
Water content on the surface is estimated at 0.14–0.27 by mass fraction (wt%). [10] Measurements of the thermal inertia of 110 Lydia give a value between 70 and 200 J·m −2 ·K −1 ·s −1/2 , compared to 50 for lunar regolith and 400 for coarse sand in an atmosphere. [ 3 ]
By contrast, if a beam's weight is fixed, its cross-sectional dimensions are unconstrained, and increased stiffness is the primary goal, the performance of the beam will depend on Young's modulus divided by either density squared or cubed.
IPv4 address exhaustion timeline. IPv4 address exhaustion is the depletion of the pool of unallocated IPv4 addresses.Because the original Internet architecture had fewer than 4.3 billion addresses available, depletion has been anticipated since the late 1980s when the Internet started experiencing dramatic growth.
6 H 2 O + 6 CO 2 + energy → C 6 H 12 O 6 + 6 O 2 where C 6 H 12 O 6 is glucose (which is subsequently transformed into other sugars , starches , cellulose , lignin , and so forth). The value of the photosynthetic efficiency is dependent on how light energy is defined – it depends on whether we count only the light that is absorbed, and on ...
The list includes figures for both fixed wired broadband subscriptions and mobile cellular subscriptions: [6] Fixed-broadband access refers to high-speed fixed (wired) access to the public Internet at downstream speeds equal to, or greater than, 256 kbit/s.
Global map of total central government revenues, as share of GDP, 2022 [1] Global map of total central government expenditures, as share of GDP, 2022 [2]. This is the list of countries by government budget.