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In an experiment, the specific heats of some inert gases (at ordinary temperature) one measured to be as follows:
|
|
1
|
767
|
August 22, 2016
|
|
The efficiency of heat engine can't be 100%. Explain why?
|
|
0
|
1830
|
August 22, 2016
|
|
What is the relative humidity on a day in July in Mumbai
|
|
1
|
950
|
August 22, 2016
|
|
Estimate the temperature of the surface of' the sun from the following data :
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1
|
1360
|
August 22, 2016
|
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Give a brief account of Joule's experiment
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0
|
1709
|
August 22, 2016
|
|
Light, from the moon, is found at the peak (or wavelength of maximum emission) at A, = 14 p m. Given that the Wen's constant 'b' equals 2.898 x ${{10}^{-3}}$ mK, estimate the temperature of the moon
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0
|
788
|
August 22, 2016
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Find the value of ${{C}_{v}}$ and ${{C}_{p}}$ for nitrogen
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0
|
588
|
August 22, 2016
|
|
A 'thermacole' ice box is cheap and efficient method for storing small quantities of cooked food in summer in particular
|
|
1
|
1362
|
August 22, 2016
|
|
In an experiment on the specific heat of a metal, a 0.20 kg block of the metal at 150°C is dropped in cu calorimeter of water equivalent0.025 kg containing 150 cm3 of water at 27°C The final temperature is 40°C. Compute the specific heat of the metal
|
|
0
|
2424
|
August 22, 2016
|
|
A 10 kW drilling machine is used to drill a bore in a small aluminium block of mass 8.0 kg
|
|
1
|
1986
|
August 22, 2016
|
|
The coefficient of volume expansion of glycerine is 49 x ${{10}^{-5}}$ ° ${{C}^{-1}}$. What is the fractional change in its density for a 30°C rise in temperature?
|
|
0
|
2775
|
August 22, 2016
|
|
A brass wire 1.8 m long at 27°C is held tight with little tension between two rigid supports
|
|
1
|
2137
|
August 22, 2016
|
|
A large steel wheel is to be fitted on a shaft of the same material
|
|
1
|
1995
|
August 22, 2016
|
|
The triple points of neon and carbon dioxide are 24.57 K and 216.55 K respectively. Express these temperature on the Celsius and fahrenheit scales,
|
|
0
|
2619
|
August 22, 2016
|
|
Why does the temperature remain constant, when solid melts or liquid boils?
|
|
0
|
572
|
August 22, 2016
|
|
A gas has two specific heats, whereas a liquid and solid have one. Why ? Or Why a gas has principle specific heat capacities?
|
|
0
|
9979
|
August 22, 2016
|
|
Calculate the power developed by a person while eating 100 g of ice per minute
|
|
0
|
5095
|
August 22, 2016
|
|
Find the increase in energy per atom of aluminium when temperature of a piece of aluminium increases by 1°C
|
|
0
|
609
|
August 22, 2016
|
|
Water is used as an effective coolant Why?
|
|
0
|
2076
|
August 22, 2016
|
|
An alloy consist of n metals of masses
|
|
1
|
470
|
August 22, 2016
|
|
What is water equivalent?
|
|
0
|
2166
|
August 22, 2016
|
|
Heating system which are based upon circulation of steam are more efficient in warming a building that these based on circulation of water. Why?
|
|
0
|
937
|
August 22, 2016
|
|
Why is the specific heat at constant pressure greater than specific heat at constant volume?
|
|
0
|
2209
|
August 22, 2016
|
|
Why do pendulum clocks move slow in summer and fast in water?
|
|
0
|
6428
|
August 22, 2016
|
|
Why a thick glass tumbler cracks when boiling water is poured in it?
|
|
0
|
4404
|
August 22, 2016
|
|
The difference between length of a certain brass rod and that of a steel rod is to be constant at all temperature. Is this possible?
|
|
0
|
2457
|
August 22, 2016
|
|
The melting point of ice decreases on increasing the pressure while the melting point of wax increase. Why?
|
|
0
|
1806
|
August 22, 2016
|
|
Two identical rectangular strips one of copper and the other of steel are rivetted to form a bimetallic strip. What will happen on heating?
|
|
0
|
2973
|
August 22, 2016
|
|
How does the density of liquid vary with temperature?
|
|
1
|
1325
|
August 22, 2016
|
|
The triple point of water is a standard fixed point in modem thermometry. Why?
|
|
0
|
481
|
August 22, 2016
|