Questions

A Windmill.

No work done as there is no external external pressure in free expansion. 

Hence, Work done in a free expansion process is Zero.

Night and Day.

Night is what that always falls but never breaks

Day is what always breaks but never falls.

There are 12 Indian origin persons in the "House of Commons".

• The House of Commons is the elected lower house of the bicameral parliaments of the United Kingdom. The UK public elects 650 Members of Parliament (MPs) to represent their interests and concerns in the House of Commons. MPs consider and propose new laws, and can scrutinise government policies by asking ministers questions about current issues either in the Commons Chamber or in Committees. 

The Article - I of the constitution of India describes India as Union of States.

The each degree of latitude is equals to 111 kms approx (69 miles). As Earth is lightly ellipsoid in shape it changes at equator and poles from 110.5 kms to 111.7 kms respectively.

The 828-metre (2,717 ft) tall Burj Khalifa in Dubai has been the tallest building since 2008.