An object is dropped from rest and falls freely with no air resistance. After 8 seconds, calculate its instantaneous speed.

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.

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue

number of electrons for neutral cl