Recent content by sphyics

GOT IT! i made a mistake while calculation; i mistook force as +ve and negative whereas i was supposed to take the work due to frictional force negative :) Thanks for your time jtbell. :) Really appreciate your help. :)

Centripetal is a real force which means it have some origin due to some interactions like the gravitational force, Electrostatic force, and one can derive CPF as acting towards and the centre; in conclusion, if one wants an object to be revolving in circular path there must be CPF, which...

Appreciate your reply :) The frictional force is to the right; the case under consideration is: when the mass is stretched to the extreme right and let it go, as the mass moves towards the left under spring action, the friction force will try to impede the motion hence to the right.. But...

Frictional force-- sign convention For a horizontal spring mass system is the frictional force considered negative (-μmg)? i guess it will be negative; the minus sign used to convey the force is trying to impede the motion of block then with that guessing work; i think friction force will be...

how to find the degree of ex and log(x). For rational expression its deg(Numerator) - deg(denominator). Whats the procedure to be followed to find the degrees of above expressions.. Please help me :)

Appreciate ur help :)

= 2x - x/y2 i think that's the right answer :)

very much thanks for ur quick response :) how does the symbol [SIZE="4"]∂ differs in meaning with [SIZE="4"]d

If a function is given by u = u(T,v) how to use the chain rule to write how u changes with respect to T & v. Please specify the steps involved. i understand chain rule as [SIZE="4"]\frac{du}{dx} = \frac{du}{dy} \frac{dy}{dx}

enthalpy is the total energy of a body of certain volume V, with pressure P on the object to make a room for itself in the surrounding and the work required is PV. So total energy comes out to be U+PV , which is enthalpy (H), and U internal energy.

in short to quantify elasticity, physics defines elasticity as "resistance to change" the greater the resistance to change greater the elasticity, the faster it comes to its original dimension, hence steel is more elastic than rubber. Even i was confused while learning the course a long ago :)...

What is Quasistatic process? the first law of thermodynamics for a quasitatic process: [SIZE="4"] dH = δQ + Vdp ------> A if it is quasi static [SIZE="4"]dp should be very small which can be ignored and hence dH = δQ so how come the equation "A" holds true for a quasi static process.

Now i understand :) Thanks all for ur help and effort appreciate it :)

yes..not an issue please be more precise :)

i'm entirely confused with this. with analyzing each definition: adiabatic process : a thermodynamic process in which there is no transfer of heat if a system is in state (P1, V1, T1) → (P2, V2, T2) if it is adiabatic no heat transfer occurs, if no heat transfer occurs the two states must be...