Is the temperature of air in the closed glass vessel/bottle the same as the temperature taken in open air? (i) What do you think is the reason for this? (ii) Do we ever come across this phenomenon in daily life?

Is the thermometer reading of the temperature of air (in shade) the same as the temperature of sand or water? What do you think is the reason for this? And why does the temperature have to be measured in the shade?

Two ideal gas thermometer A and B use oxygen and hydrogen respectively . The following observations are made: Temperature, Pressure therometer A, Pressure therometer B Triple point of water, 1.250xx10^(5)Pa , 0.200xx10^(5)Pa Normal melting point of sulphur, 1.797xx10^(5)Pa , 0.287xx10^(5)Pa (a) What is the absolute temperature of normal melting point of sulphur as read by thermometers A and B ? (b) What do you think is the reason for the slightly different answers from A and B ? (The thermometers are not faulty). what further procedure is needed in the experiment to reduce the discrepancy between the two readings.

Two closed vessels of equal volume containing air at pressure P_(1) and temperature T_(1) are connected to each other through a narrow tube. If the temperature in one of the vessels is now maintained at T_(1) and that in the other at T_(2) , what will be the pressure in the vessels?

Two closed vessels of equal volume containing air at pressure P_(1) and temperature T_(1) are connected to each other through a narrow tube. If the temperature in one of the vessels is now maintained at T_(1) and that in the other at T_(2) , what will be the pressure in the vessels?

(i) A conducting cylinder whose inside diameter is 4.00cm contains air compressed by a piston of mass m = 13.0 kg , which can slides freely in the cylinder shown in the figure. The entire arrangement is immersed in a water bath whose temperature can be controlled. The syetem is initially in equilibrium at temperature t_(1) = 20^(@)C . The initial height of the piston above the bottom of the cylinder is h_(i) = 4.00 cm. P_(atm) =1 xx 10^(5) N/m^(2) and g = 10m//s^(2) . If the temperature of the water bath is gradually increased to a final temperature t_(f) = 100^(@)C . Find teh height h_(f) of the piston (in cm) at that instant? (ii) In the above question, if we again start from the initial conditions and the temperature is again gradually raised, and weights are added to the piston to keep its height fixed at h_(i) . Find the value of teh added mass when the final temperature becomes t_(f) = 100^(@)C ?

An air column in a glass tube , is open at one end and closed at the other by a movable piston . The air in the tube is warmed above room temperature , and a 384 Hz tuning fork is held at the open end. Resonance is heard when the piston is 22.8 cm from the open end and again when it is 68.3 cm from the open end . (a) What speed of sodium is impliedby these data ? (b) How far from the open end will the piston be when the next resonance is heard ?

The diagram below shows two parallel rays A and B of red and violet light respectively incident from air on air-glass boundary. Complete the diagram showing the refracted rays for them in the glass. (i) How do the speeds of the rays differ in glass ? (ii) are the two refracted rays in glass parallel ? Give a reason for your answer. (iii) How does the refractive index of glass differ for the two rays ?

A 1-L flask contains some mercury. It is found that at different temperature, the volume of air inside the flask remains the same. What is the volume of mercury in the flask, given that the coefficient of linear expansion of glass =9xx10^(-6)//^(@)C and the coefficient of volume expansion of Hg=1.8xx10^(-4)//^(@)C ?

A 1-L flask contains some mercury. It is found that at different temperature, the volume of air inside the flask remains the same. What is the volume of mercury in the flask, given that the coefficient of linear expansion of glass =9xx10^(-6)//^(@)C and the coefficient of volume expansion of Hg=1.8xx10^(-4)//^(@)C ?

What is the fundamental frequency of vibration of air in (i) an open pipe and (ii) a closed pipe.