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Give the properties and applications of Bakelite.
This is most common type of phenol formaldehyde. This is hard, thermosetting, dark coloured material.
Its major properties are:
1. Dielectric constant is 4.1.
2. Dissipation factor is 0.001.
3. Dielectric strength is 400 V/mil.
4. Its Volume resistivity is 1013 ohm-cm.
5. Its Maximum useable temperature is 3000F.
6. Water absorption is 0.13%in 24 hours.
Applications: This is widely used for moulded parts as lamp holders, instrument cases and small panels, as electrical parts and terminal blocks or appliances for example: plug holders and sockets.
Ask question #Minimum 100 words accepted`How Daniel cell works?
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Objectives After you have done this exercise, you should be able to: 1. Prepare a comparative chart of quotations 2. fill up the quotations form 3. process a bill for
on doubling the concentration of reactant,the rate of reaction triples.what is the order of reaction?
100 mol/hr of methane reacts with steam to produce CO2 in a main reaction of the reformer. The amount of steam used is 12.5% excess based on this main reaction. Some of the methane
how scale form
construction and working of calomel and Ag-AgCl electodes
Give the properties and applications of Teflon. Teflon: This is acquired by the polymerisation of tetrafloourethylene. Properties: 1. This has good electrical, therma
Q1 What is wrong with each of the following attempts to write an electron configuration? Justify your answer with suitable explanation. (a) 1s22s3 (b) 1s22s22p23s2 (c) 1s22s23s2 (d
Water from a supply having a total head of 100 ft is used in the jet of an ejector in order to lift 10 ft3/s of water from another source (at a lower level) that has a total head o
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