Questions

Yes, it can be used, if an accurate clock frequency  is not required. also the component cost is low compared to LC or Crystal.

An Anchor.

Lime mortar is generally made with Hydraulic lime.

Agriculture would be a good example of a purely competitive industry.

New York City Subway has 468 stations (277 of which are under ground) in a network covering 370 km (230 miles)

Dr. BR Ambedkar was elected to Constituent Assembly from West Bengal.

In dealing with a coil spring the spring constant will depend on the stiffness of the spring material, the thicknessof the wire from which the spring is wound and, diameterof the turns of the coil, the number of turns per unit length and the overall length of the spring.

Brazil is one example of a closed economy in the given options. 

A closed economy is one that has no trade activity with outside economies. A closed economy is self-sufficient, which means no imports come into the country and no exports leave the country. A closed economy's intent is to provide domestic consumers with everything they need from within the country's borders.