Questions

Proxima Centauri is the nearest star to the Earth.

The memory which can be retained even the power is off is called as Permanent memory or Persistent memory. Computer's hard drive is an example of permanent memory and computer's cache or RAM are examples of temporary memory.

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.

It is a sequence of IP addresses identifying the route a datagram must follow. A source route may optionally be included in an IP datagram header

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

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