Recent content by dlre

346m/s?

i give up. I'm going to bed! good night! thanks for helping

Homework Statement the air temperature is 20 degree celsius. you are swimming underwater when you hear a boat noise. then 305s later, you hear a crash. if the speed of sound in wter is 1450m/s, how long after the crash does your friend on the dock beside oyu hear the crash? Homework...

isn't it? does it matter? if we'redoing this by meter and second, then this is my attempt d= 5300000m/s *0.87 s = 4,611,000m depth= 4,611,000/2 = 2,305,500 --------

i really have no idea. i missed two months of physics and now struggling. i think it took 870 ms to return.

Please help! trying to catch up with class! topic: the speed of sound Homework Statement Determine the depth of water if an echo using sonar returns in 870 ms and the speed of sound in water is 5300 km/h. Homework Equations distance= speed * time depth=distance/2 The Attempt at a...