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Heat Transfer
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General Science for Class 7
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Heat Transfer
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Heat Transfer
Global warming causes
extreme weather and climate changes
extreme cold in summer
skin cancers
skin burns
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Heat Transfer
In winter, closed curtains help in keeping a house warm by
preventing heat to enter
preventing light to enter
preventing greenhouse effect
trapping air
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Heat Transfer
If we melt magnesium, it would start to give
yellow glow
white light
orange glow
blue shine
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Heat Transfer
Handles of saucepans and other cooking utensils are
thermal conductors
thermal insulators
electrical conductors
metalloids
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Heat Transfer
Color and texture that is the best absorbate of radiant heat is
black and shiny
white and shiny
black and dull
white and dull
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Heat Transfer
Infrared radiations are also called
latent heat
black heat
invisible heat
visible heat
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Heat Transfer
The proportion of heat loss through walls is
half
one third
quarter
one fifth
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Heat Transfer
In common use, thermal imaging cameras can
identify temperature of roads
identify heat distribution in buildings
cool down the temperature of roads
identify the heat released by each car
Author:
rikazzz
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Heat Transfer
The best insulating windows use
single glazed windows
double glazed windows
double painted windows
single painted windows
Author:
rikazzz
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Heat Transfer
One of the medical use of thermal imaging cameras is that, they can
identify cancer cells deep in the body
identify bacteria in the vessels
identify viruses in skin tissues
identify diseases of heart
Author:
rikazzz
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