Related InterviewSolutions

• The upper end of a wire of radius 4 mm and length 100 cm is clamped and its other end is twisted through an angle of `30^@`. Then angle of shear isA. `12^(@)`B. `1.2^(@)`C. `0.12^(@)`D. `0.012^(@)`
• Two rod A and B of the same material and dame length have radii `r_(1) and r_(2)` respectively. When they are rigidly fixed at one end and twisted by the same couple applied at the other end, find the ratio of the angles of twist at the ends of A and B.
• Explain why it is difficult to make mercury enter a fine therometer tube?
• A balloon filled with helium does not rise in air indefinitely but halts after a certain height. (Neglect winds). Explain
• A stone of density `2.5 xx10^3 kg m^(-3)` completely immersed in sea water is allowed to sink from rest in 2 s. Neglect the effect of vicosity. Relative density of sea water is 1.025.
• 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` ?
• Can you measure temperature upto `500^(@)C` with a mercury thermometer, knowing that the mercury boils at `357^(@)C`?
• A boat having a length 4m and breadth 2.5 m is floating on lake. The boat sinks by 2 cm when a load is loaded on it. What is the weight of the load ? Use `g =10 ms^(-2),` density of water ` = 10^3 kg m^(-3)`
• Specific heat of argon at constant pressure is `0.125 cal.g^(-1) K^(-1)`, and at constant volume `0.075 cal.g^(-1)K^(-1)`. Calculate the density of argon at N.T.P. Given `J = 4.18 xx 10^(7)" erg "cal^(-1)` and normal pressure = `1.01 xx 10^(6)" dyne "cm^(-2)`.
• Calculate the specific heat capacity at constant volume for a gas. Given specific heat capacity at constant pressure is `6.85 cal mol^(-1) K^(-1), R = 8.31 J mol^(-1)K^(-1)`. `J - 4.18 J cal^(-1)`.