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An electrical field which is NOT changing.
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Which type of instrument are most economical and suitable for measurement of high AC DC voltage?
moving iron and eletrostatic type
What is the relation between body capacitance and healthy feeling eletrostatic charges that are generated by organic activity may have relation with body capacitance?
c=q/v c=q/v
When the eletrostatic force will be one newton?
If two charges of values 1 micro coulomb and 0.1 micro coulomb are kept in free space separated by a distance of 3 cm then the force between them will be 1 N.
What is a dissolved molecule or ion?
In water, which is a polar molecule, ions care surounded by water molecules depending on the charge of the ion. Positive ions form eletrostatic interactions with the oxygen in water and negative ions, with the hydrogens. Polar molecules are easily dissolved in water because they form hydrogen bonds, sort of the same principle behind the interactions that happen between ions and water molecules.
Is Enzyme structure is important because the enzymes shape allows only certain substrates to bind to the enzyme?
Yes, enzyme structure is important because the active site of an enzyme is specifically shaped to bind to the substrate. This specificity allows only certain substrates to fit into the active site and form an enzyme-substrate complex. The binding of the substrate to the enzyme is crucial for catalyzing the chemical reaction that the enzyme facilitates.
What increases the fluidity of the phospholipid bilayer?
Presence of Cholesterol, Unsaturated Fat, and moderate Temperatures. The Cholesterol will help the cell retain fluidity even at lower temperatures, but higher temperatures will cause it to "Gum Up"
Do ionic compounds dissolve in nonpolar compounds?
Ionic compounds do not dissolve in non-polar compounds. They can dissolve only in polar compounds. Dissolution is actually dissociation of the ionic compounds and the polar solvent into constituent ions and development of weak forces of attraction called hydrogen bonds. The dissociation is not necessarily complete always.
Where might eletrostatic charge be a hazard?
[Electrostatics generated by what is called triboelectric effect, occur all the time around us every day. We just don't notice most of the time. Anyone taking a piece of pastic wrap off a roll is generating static electic charges; that individual is actually separating charges to create voltage. In that case, the voltages are small, but in other cases, the voltages can become significant - and dangerous in the exteme!] The discharge of electrostatic buildup can be a major problem around volatile chemicals such as gasoline or other fuels. The spark created by the equalization of charge can ignite them. Worse, if vapors are present in a sufficient concentration, the combustion will be so rapid that there will actually be an explosion! Even dense dust clouds can combust when exposed to electrostatic discharge, as any workers around grain elevators are constantly trained to be aware of. One example involves fueling cars at a gas station in winter. Passengers who leave the vehicle may deposit a strong charge on the vehicle, and if the metal gas nozzle then touches the car body, the spark can ignite the fuel vapors. During refuelling of aeroplanes, friction between the fuel and the hose causes static electricity. A wire can be used to discharge it safely, much like a lightning conductor, and the use of this grounding wire is mandated on fuel trucks at airports. Also there are two safety hazards involving electrostatic generators used in science classrooms. The first involves heart fibrillation caused by capacitors or "Leyden Jars" being discharged across a victim's chest. If a VandeGraaff or Wimshurst machine is used to charge up a Leyden Jar with capacitance larger than about 100 picofarads, and if the victim touches the terminals with two opposite hands (so the current path is through arms and chest,) the large current can trigger a heart attack. This happens rarely, but the danger is always there. The second involves heart fibrillation caused by discharging of a "human chain." If a large group of students holds hands while one student touches an electrostatic generator, the chain of students becomes charged. If one student then touches a grounded water pipe or electric outlet, the current through that student's chest can be more than enough to trigger a heart attack. Also, there are solid state (semiconductor) devices, such as CMOS components, that are particularly vulnerable to electrostatic discharge. This can involve humans in that any persons with implanted medical devices which extend through the skin (such as Cochlear Implants) and which use CMOS electronic components, might destroy their expensive devices by causing an arc from their body to a metal object. 2. One of the most hazardous places electrostatic charge can be is in the fireworks, munition factories and solid space rocket booster factories. Before the final products are produced there is mixing of firing explosives in motors for fireworks rockets. Gun powder can also be ignited by a spark from an electrostatic discharge. These factories are extremely dangerous in that there is a large amount of these explosives stored on location.
