Diver uses a sonar device to determine the distance to her diving partner. the device sends a sound wave and records the time it takes for the wave to reach the diving partner and return to the device. suppose the wave travels at a rate of about 4000 feet per second. the wave returns 0.8 second(s) after it was sent. how far away is the diving partner?

Assuming the divers are not moving. The diving partner is at 1600 feet.

Explanation:

The sound wave have to  go to the diving partner and return, so its traveling the double of the total distance.

Been X= distance, V= speed, and t= time

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.