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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.
In the dryer air furnace, a natural gas containing 92.5 mole% methane, 4.8% ethane, and the remainder propane is burned with 20% excess air. The fuel enters the furnace at 25°C and
Outdoor facilities, if any For biology lab there may be an animal house, green house, garden plots, aquarium, a vivarium etc. Also find out how they are connected with the main
Hard magnetic materials Permanent magnets are used as passive generators of magnetic field. To produce and maintain the magnetic field, a material should have both high resid
how to
I want some lecture notes on properties of pure substances, Ideal gas laws
Question : Give a basic introduction on PHYSIOLOGICAL PHARMACOKINETICS ? Answer: The history and bases of physiological pharmacokinetics will be briefly reviewed, pointing out
Zeolites are used to adsorb a wide range of solutes from vapour and gas streams. What is it about their structure that makes them suitable for selective adsorption? What isotherm(s
alfred werner coordination number
chemistry separate the mixture of sand and naphthalene by sublimation
Colebrook equation is used to find a friction factor, f , in a pipe flow as given by: where ? and Re are the roughness ratio and Reynolds number respectively. Considering
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