Recent content by alnywk

urgent : single phase transformer Homework Statement A 2200/220 V, 500kVA, 50Hz distribytion transformer has been tested by means of the open circuit. the test data obtained is as follow: open circuit test: V(l)= 220V, I(l)= 85A, P(oc)= 1800W short circuit test V(h)=95V...

http://www.electronics-lab.com/projects/science/006/emmeter.gif" i want to ask 1. is it used to detect emf ? is it an emf meter 2. how to detect 3. how does am-plifer work ? transistor used for?? diode use for? 4 if i change other value of capacitor? inductor? resistor...

what is the total resistance of the cube if each edge hv six ohm ? help me please i don't know how to draw a simple diagram

is this action violate the first law of thermodynamics?? how about if you shake the beer, is it mean you input the energy into the system , then do it violate the 1st of thermodynamic?

why there have bubble in beer, what the pathway do the bubbles go in pv diagram my idea : assume temperature is constant pressure in the bottom is higher than the suface so the bubbles size increase then where the energy come from?

it takes an input of energy to convert liquid to vapour ,so increse the entropy if an increase in entropy is natural, why does this not happen naturally with less effort on its own?

THAT not homework i don't know the internal energy hv chane or not how about other

do heat will flow from the lower energy to higher/

please use the law of thermodynamics to explain why the liquid wil squeeze out after shaking the coke ?? (dont use the equilibrium)

i am going to write a report about damped oscillation . as i planned , i will discuss the amplitude decays exponentially with time , application . but that are too little to talk to then what things need to be further discuss? and one question if i use one small card and bid card to damp...

another the boiling point of mixing hexane and propanone just opposite . it's curve drop but rise slightly . why ? Volume of trichloromethane/cm3 10 10 10 10 5 2 0 Volume of ethyl ethanoate/cm3 0 2 5 10 10 10 10 Volume % of ethyl ethanoate Boiling point/0C 67 52 49...

help!can anyone answer my question! it is the experiment that i did in school!~ topic:boiling point with composition for different mixtures of two miscibe liquids first: mixing trichloromethane and ethyl ethanoate so the following is the result~ Volume of trichloromethane/cm3...