|
Distinguish between conduction, convection and radiation
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0
|
14835
|
December 23, 2016
|
|
Explain why a body with large reflectivity is a poor emitter
|
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1
|
5642
|
December 23, 2016
|
|
Explain the following Hot tea cool rapidly when poured into the saucer from the cup
|
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1
|
4299
|
December 23, 2016
|
|
Two vessels A and B of different materials but having identical shape
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1
|
4387
|
December 23, 2016
|
|
On a hot day, a car is left in sunlight with all the windows closed
|
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1
|
3307
|
December 23, 2016
|
|
A piece of paper wrapped tightly on a wooden rod
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1
|
2171
|
December 23, 2016
|
|
Woolen clothes are warm in winter. Why?
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0
|
987
|
December 23, 2016
|
|
The earth constantly receives heat radiation from the sun and gets warmed up. Why does the earth not get as hot as the sun?
|
|
0
|
1270
|
December 23, 2016
|
|
How does tea in a thermo flask remain hot for a long time?
|
|
0
|
4209
|
December 23, 2016
|
|
If a drop of water falls on a very hot iron, it does not evaporate for a long time. Give reason
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|
0
|
4497
|
December 23, 2016
|
|
Why it is much hotter above afire than by its side?
|
|
0
|
2203
|
December 23, 2016
|
|
Why rooms are provided with the ventilators near the roof?
|
|
0
|
5653
|
December 23, 2016
|
|
Two thermos flasks are of the same height and same capacity
|
|
1
|
2502
|
December 23, 2016
|
|
What kind of thermal conductivity and specific heat requirements would you specify for cooking utensils?
|
|
0
|
9397
|
December 23, 2016
|
|
In a coal fire, the pockets formed by coals appear brighter than the coals themselves
|
|
1
|
2742
|
December 23, 2016
|
|
Why birds are often seen to swell their feathers in winter?
|
|
0
|
4587
|
December 23, 2016
|
|
Place a safety pin on a sheet of paper
|
|
1
|
972
|
December 23, 2016
|
|
Why water is preferred to any other liquid in the hot water bottles?
|
|
0
|
1858
|
December 23, 2016
|
|
Can we boil water inside in the earth satellite?
|
|
0
|
2522
|
December 23, 2016
|
|
White clothes are more comfortable in summer while colourful clothes are more comfortable in winter. Why?
|
|
0
|
1836
|
December 23, 2016
|
|
The triple point of water is a standard fixed point in modem thermometry
|
|
1
|
2058
|
December 23, 2016
|
|
The triple points of neon and carbon dioxide are 24.57 K and 216.55 K respectively
|
|
1
|
2636
|
December 23, 2016
|
|
The difference between length of a certain brass rod and that of a steel rod is claimed to be constant at all temperatures. Is this possible?
|
|
0
|
10496
|
December 23, 2016
|
|
In what ways are gas thermometers superior to mercury thermometers?
|
|
0
|
2041
|
December 23, 2016
|
|
Two identical rectangular strips-one of copper
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|
1
|
685
|
December 23, 2016
|
|
There are two spheres of same radius and material at same temperature
|
|
1
|
6846
|
December 23, 2016
|
|
Gas thermometers are more sensitive than mercury thermometers. Why?
|
|
0
|
2968
|
December 23, 2016
|
|
There is a slight temperature difference between the waterfall at the top and the bottom. Why?
|
|
0
|
4816
|
December 23, 2016
|
|
What are the basic requirements of a cooking utensil in respect of specific heat
|
|
1
|
2914
|
December 23, 2016
|