Physics
Water is not suitable as a calorimetric substance because it :

Has high boiling point
Low latent heat of vapourization
Is a good conductor
Has high specific heat

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Physics
The bats can fly in the dark because

They can see the objects in darkness
They have weak legs and are likely to be attacked by predators
They generate flashes of light
They generate ultrasonic sound waves

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Physics
Which of the following is not a property of heavy water ?

Boiling point of heavy water is lower than that or ordinary water
It produces corrosion
Density of heavy water is higher than that of ordinary water
Freezing point of heavy water is higher than that of ordinary water

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