Molecular Physics | Thermodynamics Answers

The time period of a simple pendulum ,called 'second pendulum ' is 2 s .Calculate the length ,angular frequency And frequency of the pendulum .What is the different b/w a simple pendulum & a compound pendulum?

Explain the working of a platinum resistance thermometer with the help of a neat and labelled diagram.

Draw Carnot cycle on (i) p-V, and (ii) T-S diagrams. With the help of p-V diagram

Calculate the most probable speed, average speed & root mean square speed for gas molecule at 300K .the mass of gas molecule is 5×1/10000000000000000000000000000 kg &Kb = 1.38 ×1/1000000000000000000000000 J/know.

Explain the statement “entropy of earth-sun system increases” in the light of the principle of increase of entropy.

One molelse of an ideal gas expand isothermally to five times its volume. Calculate the entropy change in terms of R , the gas constant.

A sonometer wire having cross sectional area 0.85×1/1000000 m2 is stretched between two rigid supports 1.2 my apart .A tension of 20 N is applied at its free end .if the temperature is reduced by 12°C, Calculate the field tension in the wire .Take coefficient of linear expansion & isothermal young's modulus to be 1.5× 1/100000 1/K & 2 ×100000000000 N/my, respectively.

List the different between first and second order phase transition. What are the characteristics of lambda transition.?

a. Draw the carnot cycle on P-V diagram. Show that the amount of heat absorbed ( rejected ) in a reversible cycle is proportional to the temperature of source (sink).

b. The efficiency of a carnot engine is 30% . Its efficiency is to be raised to 60% by how much the temperature of the source be increased if the sink is at 27°?

Calculate the temperature at which the root mean square speed of hydrogen and oxygen molecules will be equal to their escape velocities from the earth gravitational field. The radius of the earth is 6400 km

Take , NA= 6×1000000000000000000000000000000 1/mol
KB= 1.38 × 10/100000000000000000000000000 j/k
g= 9.8 m/s2