Questions

To obtain exotic spices or to find trade items are not the reasons for christian missionaries went to Asia.

The compound methane is a simple hydrocarbon contains one carbon bonded to four hydrogens. Ethane is a simple hydrocarbon which contains two carbon atoms and four hydrogen atoms. Similarly, propane with three carbons.

Smoke alarms are also necessary in public places like banks, theaters, rest rooms, aeroplanes,...

A seconds pendulum is a pendulum whose period is precisely two seconds i.e, one second for a swing in one direction and one second for the return swing.