For sand of uniform spherical particles, the void ratio in the loosest and the densest states are ________ and ________ respectively.

When the product of rock weathering is not transported as sediment but remains in place, is called

A tropical cyclone in a northern hemisphere is a wind stream with

A prestressed concrete beam has a cross-section with the following properties: Area $$A = 46,000\,\,m{m^2},$$ $${\rm I} = 75.8 \times {10^7}\,\,m{m^4},$$ $${Y_{bottom}} = 244\,\,mm,$$ $${Y_{top}} = 156\,\,mm.$$ It is subjected to a prestressing force at an eccentricity $$'e'$$ so as to have a zero stress at the top fibre. The value of $$'e'$$ given by