Homework Statement
A rigid uniform horizontal wire PQ of mass M, pivoted at P, carries a constant current I. It rotates with a constant angular speed in a uniform vertical magnetic field B. If the current were switched off, the angular acceleration of the wire in terms of B, M and I would be...
Homework Statement
A solid metallic cube of heat capacity S is at temperature 300K. It is brought in contact with a reservoir at 600K. If the heat transfer takes place only between the reservoir and the cube, the entropy change of the universe after reaching the thermal equillibrium is
A...
I got it.
Thank you.
I made the mistake of including F even for the second blockSystem: Second Block(behind)
T=ma
System: First Block(Front)
F-T=ma
F=ma+T
F=2ma
F/2=ma
Hence, T=F/2
Thanks, again
Homework Statement
Two blocks of equal mass m are tied to each other through a light string. One of the blocks is pulled along the line joining them with a constant force F. Find the tension in the string joining the blocks.
Homework Equations
I tried doing this by this method.
(I don't know...
r is the radius of the atom.
Volume unoccupied is the free volume. It is the difference between total volume of cubic cell and the volume occupied by the atoms. Am I right?
Homework Statement
The fraction of volume unoccupied in the unit cell of the body centered cubics lattice is?
Homework EquationsThe Attempt at a Solution
I got the volume occupied by the atoms as (8/3)πr3. I am not sure if it is right. I just assumed that all the atoms were of same element.
I...
I want to be a physicist. It has always been my dream, but I am having doubts about my ability.
I am preparing for a few competitive exams to get into good colleges offering Int-PhD. I found that I am unable to even solve some of the problems. It becomes obvious when I see the solution. Is...