The talk test measures ease of speaking during exercise
O your fitness level
O how hard you are stretching your muscles
O how well you speak

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.

it would be kevlar ^^

i already answered it by 34/s