what type of battery is mercury cell? why is it more advantageous than dry cell? - batteries - primary batteries
what type of battery is mercury cell? why is it more advantageous than dry cell?
mercury cell is a type of primary battery. in primary batteries, the charging reaction occurs only once and after it has been used over a period of time, the battery becomes dead and cannot be reused. mercury cell is more advantageous than dry cell because dry cell has a very short life span due to the conversion of zinc to zinc chloride that makes the zinc casing porous. due to this porous casing, the substance inside the cell leaks out and corrodes the metal, reducing the lifetime of the cell. while, in the case of mercury cell, the overall reaction does not involve formation of any ion in the solution whose concentration can change during its life time.
hummergirl,
 the answer is in your question. the difference between the wireless case and the regular case is the fact that you can charge the wireless case by placing it on a charging pad and not have to plug in a charging cable directly in to it but that is an option should you not have a charging pad. of the two different tools, research has shown that electrical conductivity diamond testers are much better than thermal conductivity diamond testers. they are higher in price, but much more accurate. heat testers are much cheaper but their accuracy is not as high, so may not get as good results. electricity-based diamond tester meristematic
tissues
permanent tissues


1 meristematic tissues have the capacity
to divide
1 permanent tissues do not have the
capacity to divide


2 they have thin cellulose wall and do
not have intercellular spaces
2 they have thick cellulose wall and they
do have closely packed or small intercellular spaces


3 they contain dense cytoplasm with
prominent nucleus
3 they contain thin cytoplasm with normal
nucleus


4 they contain many small vacuoles in
their cytoplasm
4 they contain a single large vacuole in
their cytoplasm If the laptop battery is more than 3 - 4 years old then the battery could be worn out. Rechargeable batteries have a finite number of charge and discharge cycles and will lose their charge capacity over time, i.e. won't charge to 100% and gradually the charge reduces until the battery won't charge up at all.  

OR The battery shows a 100% charge but when the adapter is disconnected the battery drops off to zero capacity in a very short time.  
If the battery drops to an unacceptable charge level then the battery needs to be replaced 1. introduction: rough surface in contact i. surface of engineering materials: generals  surfaces have chemical properties, which are different from bulk virgin material. o most metallic surfaces in air have oxide layers, which change the chemical and mechanical properties of the surfaces.  surfaces have mechanical properties, which are different from bulk material. o machining or sliding contact makes strain hardened (or work hardened) layer and highly deformed layer, whose strength are different from bulk.  real engineering surfaces are rough. mirror like smooth surface afm image if you right click on the battery\_simple\_dynamics subsystem, you can go to mask -> look under mask. here, you will see that the state of charge is being computed in this subsystem. the ah*0.2*3600 constant block after changing to ah*0.1*3600 i then see an initial charge state of 90%. **Hint—**  Vacuoles not only store many important substances, they also contain cell sap that give turgidity to cell automatic is a bit better then mt these days for city driving and highways but a bit costlier and manual will be better on hillside only, against cvt. manual is evergreen if comfort can be compromised. i'm a tradesman and have used many power tools to me your craftsman cordless drill seem to be biting the dust, because of the internal components are not made to last.
i own a dewalt xrp 510 unit watts like this one http://www.dewalt.com.au/powertools/productdetails/catno/dc920ka/

one day at work i was asked to drill some 25 3/8' holes into a concrete slab to take dyna bolts,i was working on a union site where if i used a power cord it needed to be off the ground for safety reasons on hook, i had a hammer drill to do this with a power cord but couldn't be hassled with finding a power point getting stands to keep the lead off the ground and so on.

so i just used the dewalt, while drilling these holes the drill got so hot i had to stop 3 times to let the drill cool down before i could touch it again, no burnt smell and the drill never missed a beat that day or after. (the drill was still working 100%, it was me that couldn't take it being that hot)

i asked a power tool service guy once what's the difference between expensive power tool and the rest, he told me the better power tools have metal parts which can't burn out or melt which gives you the burnt plastic smell, 

to answer your question i'd say the new battery is working the drill harder than it can take, if the battery was faulty i doubt your drill would even work imo. an alloy is combination of a metal and a non metal. so it has partial characteristics of metal and non metal. being analloy the ions it it are randomly arranged. it does not have a specific arrangement of ions. hence the flow of electrons in this is more. the this feature of alloy leads to increase in resistivity due to free crystal lattice. we know that metals have high melting point but an alloy has low melting point beacause the presence of a non metal in it behaves as an impurity and restricts in raising to high melting point. due to high melting point the it takes a lot of current to melt and leads in slow movement of electrons which makes the device less efficient. therefore electronic device requires the metal of low melting point. an alloy plays the best role in the elctronic device like electric iron and heater.