How many different atoms are there in a compound? ​

2 or more atoms

Explanation:

yes yes yes yes yes yes yes yes

Two or more

Explanation:

It's mostly two but unique structures might compose of more than 2

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.

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.