1.what is beta in control valves? 2.what is the condition followed by light in

1.what is beta in control valves?
2.what is the condition followed by light in LASERs?
3.1kg/cm2=?psi
4.Integral action reduces what?
5.about vena contracta
6.a simple RC circuit
7.thermistor material's temp coefficient of resistance
8.if wave passes through the thicker area of a chord to a
thinner area what changes will occur to wavelength?
9.if 4-20 mA represents 0-10 kg/cm2 what will be the current
when pressure is 5 kg/cm2.................

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