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Physics

Physics
Which one type of radiation has the longest wave length

Infrared
Ultraviolet
Radio Wave
X-ray

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Physics
Which one of the following is a non-dimensional quantity?

Strain
Plank's constant
Co-efficient of viscocity
Gas constant

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Physics
The instrument used to see the distant objects on the Earth is

Simple microscope
Astronomical telescope
Terrestrial telescope
Compound microscope

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Physics
The damage of the human body due to radiation (X-rays or grays etc,) is measured in :

Rems
Roentgen
Curie
Rads

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Physics
Mercury is commonly used as a thermometric fluid rather than water because

specific heat of mercury is more than water
density of mercury is more than the water
mercury has greater visibility than water
specific heat of mercury is less than water

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Physics
It is more difficult to walk on ice than on a concrete road because

There is more friction between the ice and feer
Ice is soft when compared to concrete
There is very little friction between the ice and feet pressing it
None of these

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