Question 2 of 10 What type of system allows matter and energy to enter and exit? O A. Connected OB. Open O C. Closed O D. Isolated

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.

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms

answer; equivalent to a one(1) horsepower motor;

at right angles to each other