The coefficient of linear expansion of steel and brass are `11 xx 10^-6//^@ C` and `19 xx 10^-6// ^@ C`, respectively. If their difference in lengths at all temperature has to kept constant at `30 cm`, their lengths at `0^@ C` should beA. `71.25 cm and 41.25 cm`B. `82 cm and 52 cm`C. `92 cm and 62 cm`D. `62.25 cm and 32.25 cm`

The coefficient of linear expansion of steel and brass are `11 xx 10^-

1.	The coefficient of linear expansion of steel and brass are `11 xx 10^-6//^@ C` and `19 xx 10^-6// ^@ C`, respectively. If their difference in lengths at all temperature has to kept constant at `30 cm`, their lengths at `0^@ C` should beA. `71.25 cm and 41.25 cm`B. `82 cm and 52 cm`C. `92 cm and 62 cm`D. `62.25 cm and 32.25 cm`
Answer» Correct Answer - A `Delta l_1 = Delta l_2` `:. L_(1) alpha_(1) Delta theta = l_(2) alpha_(2) Delta theta` or `(l_1)/(l_2) = (alpha_2)/(alpha_1)= (9)/(11)` In option (a), ratio is `(19)/(11)`.

Discussion

No Comment Found

Related InterviewSolutions

Real gases behave as ideal gases most closely at low pressure and high temperature. Intermolecular force between ideal gas molecules is assumed to be zero.A. If both Assertion and Reason are true and the reason is correct explanation of the Assertion.B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.C. If Assertion is true, but the Reason is false.D. If Assertion is false but the Reason is true.
Vibrational kinetic energy is insignificant at low temperatures. Interatomic forces are responsible for vibrational kinetic energy.A. If both Assertion and Reason are true and the reason is correct explanation of the Assertion.B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.C. If Assertion is true, but the Reason is false.D. If Assertion is false but the Reason is true.
Change each of the given temperature to the Fahrenheit and Reaumur scale : `30^@ C, 5^@ C and -20^@ C`.
The temperature Ton thermodynamic scale is defined in terms of a property `p` by the relation `T=a lnp+b` where `a` and `b` are constants.The termperature of the ice point and steam point are assigned the numbers 32 and 212 respectively and the values of `p` at these temperatures are 1.86 and 6.81 respectively. Calculate the temperature on this scale when `p=2.50`
Mercury thermometers can be used to measure temperatures uptoA. `100^(@)C`B. `212^(@)C`C. `360^(@)C`D. `500^(@)C`
An ideal gas exerts a pressure of `1.52 MP`a when its temperature is `298.15 K` and its volume is `10^-2m^3`. (a) How many moles of gas are there ? (b) What is the mass dencity if the gas is molecular hydrogen ? ( c) What is the mass density if the gas is oxygen ?
Three moles of an ideal gas having `gamma = 1.67` are mixed with 2 moles of another ideal gas having `gamma = 1.4`. Find the equivalent value of `gamma` for the mixture.
Two moles of helium (He) are mixed with four moles of hydrogen `(H_2)`. Find (a) `(C_(V)` of the mixture (b) `(C_(P)` of the mixture and ( c) `(gamma) `of the mixture.
Two gases occupy two containers (A) and (B). The gas in (A) of volume `0.11 m^3` experts a pressure of `1.38 Mpa`. The gas in (B) of volume `0.16 m^3` experts a pressure of `0.69 Mpa. Two containers are united by a tube of negligible volume and the gases are allowed to intermingle. What is the final pressure in the container if the temperature remains constant ?
A block of ice at `-10^@C` is slowly heated and converted to steam at `100^@C.` Which of the following curves represents the phenomenon qualitatively?A. B. C. D.

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment