Recent content by phymatter

as temperature of a conductor increases why does the ratio of conductivity to resistivity increase ?

how is a virtual object identified ?

how can we say that the image formed by a concave mirror is always real if object is virtual? please help

Homework Statement what is the identity of a3 + b3 + c3 i am getting a bit confused please help! Homework Equations The Attempt at a Solution

what will happen to capillary rise effect if we take capillary to space g=0?

if air is pushed inside a soap bubble then why does the pressure decrease ?

does gravity effect viscosity ? is viscosity independent od gravity ?

if water is flowing in a streamline motion then at 2 points at same horizontal level can the pressure be same if area is not same ? please help!

what is the relation between surface tension and pressure ? are they same dimensionally? can they be equated?

if we take a liquid to agravity free space then is the bouyant force is 0 ?

if two circular discs of different radius and angular velocity are brought togather , they experience friction and finally there is no slipping between them , why is the total angular momentum not conserved in this case ? there is no eternal torque , friction is an internal force of the system ...

thanks mapes ! but how will this give effective young's modulous ? i am a bit confused , please help !

is there a formula to calculate the young modulous of a system like for resistances in series and parallel ?

if the Earth stops rotating , what will happen to the apparent value of g on its surface ?

thanks Penn.6-5000 !