Submarine Canyons

An Indian submarine and an enemy submarine move towards each other during maneuvers in motionless water in the Indian ocean. The Indian submarine moves at 50 km/h , and the enemy submarine at 70 km/h . The Indian sub sends out a sonar signal (sound wave in water) at 1000 Hz . Sonar waves travel at 5500 km/h . What is the frequency detected by the Indian submarine

Sodium peroxide is used to purify the an m submarines and confined spaces because:

The construction of a submarine is based on:

The Asia-Africa-Europe (AAE-1) submarine cable system, the world's longest 100-Gbps submarine cable system was launched by ______

Which of the following compound is/are used for oxygenating the submarine or spaceshuttle?

A submarine that is not moving sends out a sonar sound wave travelling at 2000 m /s is, which reflects off a boat back to the submarine. The sonar crew detects the reflected wave 8 s after it was sent out. How far away is the boat from the submarine ?

KO_(2) ( potassium super oxide ) is used in space and submarines because it :