Physics
When hot liquid is poured into a thick glass tumbler, it cracks because glass :

Is a bad conductor of heat so only inner surface expands
Has a very low specific heat
Has low temperature coefficient of expansion
Has high temperature coefficient of expansion

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Physics
Which one of the following is the correct sequence of passage of light in a compound microscope?

Eyepiece -Objective lens -Body tube -Mirror
Condenser -Objective lens -Eye -piece -Body tube
Condenser -Objective lens -Body tube -Eyepiece
Objective lens -Condenser -Body tube -Eye piece

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