Draw a labeled diagram of a common hydrometer and state the principle used in it’s working?
It works on the principle of floatation i.e., a floating body displaces liquid equal to its own weight.
What is meant by Global warming?
i) It is observed that the temperature of the surroundings starts falling when the ice in a frozen lake starts melting. Give a reason for the observation.
ii) How is the heat capacity of the body related to its specific heat capacity?Specific Heat Capacity of substance A is 3.8 J g-1 K-1 whereas the specific heat capacity of substance B is 0.4 J g-1 K T-1.
i) Which of the two is a good conductor of heat?
ii) How is one led to the above conclusion?
iii) If substances A and B are liquids then which one would be more useful in car radiators?
i) State any two measures to minimize the impact of global warming.
ii) What is the Greenhouse effect?Differentiate between heat capacity and specific heat capacity.
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