Molecular Physics | Thermodynamics Answers

All of the electrical outlets in a room are connected in a single parallel circuit. The circuit is equipped with a 20-A fuse, and the voltage is
V = 220 V.

(a) What is the maximum total power that can be supplied by the outlets without blowing the fuse?



(b) How many 2,300-W appliances can be plugged into the sockets without blowing the fuse?

The resistance of each brake lightbulb on an automobile is
4.0 Ω.
Use the fact that cars have 12-V electrical systems to compute the current that flows in each bulb if they are connected in series. (For simplicity, assume that the circuit is only composed of one brake lightbulb and the car battery.)

Select all of the following descriptions that match what happens when a ferromagnetic material is placed in an external magnetic field.

The ferromagnetic material rapidly cools.
The ferromagnetic material becomes negatively charged.
The ferromagnetic material becomes positively charged.
The external magnetic field induces magnetic poles in the ferromagnetic material.
The ferromagnetic material becomes magnetized.
Nothing, ferromagnetic materials do not interact with magnetic fields.

If I fill 3 molecules of air which are very hot in a container and if I fill 10 molecules of air which have room temp in the another container which is exactly identical to first one that is has same volume so which container is gonna experience more pressure on its walls
The one which has high temp 3 molecules
Or the other having room temp 10 molecules
Actually 3 molecules have been heated while those 10 have not been

one gram of ice at 0°C is mixed with one gram of water at 100°C the resulting temperature will be
1)5°C
2)0°C
3)10°C
4)100°C

Write Planck's formula for energy density of a
black body radiation. Show that Rayleigh-Jeans
law, Wien's law and Stefan's law are contained
in it

What is transport phenomena ? Obtain the
expression for viscosity of gas by assuming that the number of particles crossing the plane from either side per unit area per second is 1/4 nv. Discuss its temperature and pressure dependence.

What is Brownian motion ? Give two examples of Brownian motion. Discuss Perrin's experiment to determine Avogadro's number.

Draw a labelled diagram for the
experimental arrangement used in adiabatic
demagnetization of a paramagnetic
substance. State the lowest temperature
attainable with this method.

One mole of an ideal gas is expanded
isothermally to four times its initial volume.
Calculate the entropy change in terms of R,
the gas constant.