Recent content by steve oliver

what causes radioactive decay i mean i know throw decay could turn unstable to stable atom. But what cause it unstable?

A book said that the PE of molecules increase during melting of ice but shouldn't it be decrease since the distance between molecules increase ?Isnt the force between the molecules determine the PE?

what is electric potential?and what is the difference between electric potential and potential difference?

thank you

why would a flame contain electrons and ions??

then what if the light bulb in primary coil is connected with the light bulb in secondary coil. i mean they are in the same circuit.

But shouldn't iy have double current that of ix?

Then in the following question how should i calculate. Two identical light bubls x and y are connected respectively to the primary and secondary coils of an ideal step downtransformer.The turn ratio of the transformer is 2:1.Calculate the power dissipated in x and y. method 1: i^2r x:y=1:4...

i get it now thank you

then what makes the bulb connected to a step up transformer become brighter

theroteically using transformers can't create power then why a light bulb connected with a step up transformer can become brighter

when i compare the brightness of the light bulb in the primary transformer and the secondary transformer (step up transformer) the secondary light bulb is brighter . teacher say because of v^2/r after step up the v increase and so the power. however if i use i^2r after step up i decrease power...