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If one amplifier has its own feedback then that will be its gain witch can be added to the next amplifier gain. if both amplifier have a common feedback then that will be to total gain for both.
Atmospheric Fluidized Bed Combustion Boiler (AFBC boiler) is a type of operational boiler. In a AFBC boiler a little more fluidized bed combustor is added than a conventional shell boiler.
One way to prevent the corrosion of iron is by applying a protective coating, such as paint or a corrosion-resistant metal coating. Another method is by using corrosion inhibitors, which are chemicals that can be added to the environment around the iron to slow down or prevent the corrosion process. Additionally, ensuring proper maintenance and regular inspection of iron structures can help identify any signs of corrosion early on and take appropriate actions to prevent further damage.
Most Nazi scientific efforts were guided by military considerations, they were especially fruitful in the areas of rocket propulsion, jet propulsion, and missile guidance. To name a few:V-1: The first operational, powered, UAV (Unmanned Air Vehicle), first pulse-jet-propelled air craft, first cruise missile.V-2: The first operational, short range, ballistic missile. It achieved sub-orbital space flight at an altitude of approximately 80 km.Rheinbote: The second operational, short range, ballistic missile, designed to replace or augment large bore artillery pieces.Ruhrstahl X-4: The first wire-guided ATA (Air-To-Air) missile, developed & tested, but never deployed.ME163: The first operational, manned, rocket-propelled air craft.ME262: The first operational, manned, jet-propelled air craft.Der Wasserfall (The Waterfall): The first developed, but never deployed, rocket-propelled STA (Surface To Air), guided missile. Today it would be called a SAM.Henschel Hs 293: The first operational, Anti ship, Rocket-propelled, guided missile (It began as Fritz X, a stand-off, radio-controlled, gliding bomb (also, a first); then the engine was added to allow low altitude delivery and to increase range and stand-off distance.)Henschel Hs 293D: As above, but television guided (never deployed).
Circuits are not made of voltages, they are made of loops. A short circuit exists when a connection is added that is not supposed to be part of the intended circuit as designed. This added connection produces extra loops in the circuit that typically prevent current from reaching parts of the circuit where it is needed and can cause excessive current to flow in other parts of the circuit, resulting in damage to the components in the circuit.
it is added to prevent freezing of gasoline
Iodine is often added in traces to prevent this.
to prevent haemodialysis
3% of gypsum is added to cement to "prevent the rapid setting of cement"
your head
Sometimes it is--chemicals can be added to prevent discoloration.
Some chemicals added to prevent tooth decay are: sodium fluoride, potassium fluoride, stannous fluoride, sodium fluoride phosphate, etc.
Benzoic acid is added to prevent spoilage of cold drinks
Goiter is a problem with the thyroid gland, most commonly caused by an iodine-deficiency disease. You can prevent or cure it by eating seafoods which are rich in iodine, or by using iodized table salt.
fresh water
humus
Fluoride