Questions

ESTRANGE means cause (someone) to be no longer on friendly terms with someone. Alienate also means same - make (someone) feel isolated or estranged.

Angle traced by hour hand in 12 hrs = 360º.

Angle traced by hour hand in 5 hrs 10 min.  i.e., 31/6 hrs = 36012*316°= 155º

After the Mumbai attacks in 2008, there has been a paradigm shift in the maritime security apparatus that increased emphasis on surveillance, intelligence gathering and information sharing amongst the various stakeholders to ensure an effective response to any emerging situation. In Feb 2009, the Indian Coast Guard (ICG) was additionally designated as the authority responsible for coastal security in territorial waters, including areas to be patrolled by the Coastal Police.

The Coast Guard is also responsible for overall coordination between Central and State agencies in matters relating to Coastal Security.In order to achieve near gap-free surveillance of the entire coastline, 38 additional Radar Stations and 08 Mobile Surveillance Systems are being installed.

Fathometer is used to measure Ocean depth.

Fathometer is A depth finder that uses sound waves to determine the depth of water.

The Richter Scale is used to measure the intensity of Earthquakes.

The Decibel Scale is used to measure sound intensity.