Aship sends out a pulse of sound and receives an echo back one second later. if the water is 750m deep, what is the speed of sound in water?

1500 m/s

Explanation:

The sound wave travels 750 meters from the ship to the bottom of the water, then 750 meters back to the ship.  So it travels a total distance of 1500 meters in 1 second.

So the average speed is:

v = 1500 m / 1 s

v = 1500 m/s

hèllo, sorry i really need some more points so if you need this qustion answered than retype it

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.