3 hours 15 minutes
That depends on your speed.
Five hours.
It would depend on your speed
3 months
22.7 seconds.
If you mean how long do you take a pulse for? A Mintute.
A mid ocean ridge
Leonardo Davinci
Undersea fiber optic cables have largely replaced the old copper cables. They are used to carry data, including telephone calls, around the world.
Take a pulse for a maximum of 10 seconds.
As long as blood is pumping through the testicle then it should have a pulse, the left testicle should have a pulse too.
sonar - by bouncing sound signals off the bottom of the ocean, they were able to map the depth of the ocean. Deep sea diving would take too long. Satellites were not in orbit until the 1970's and submarines were not necessary since sonar could be done from the surface on a boat.
apical pulse has to be listened to for 1 full minute
foot long pulse tail
2-4 hours
Sonar was never 'invented' as such, it was adapted from nature. Bats, many deep water fish and small bugs rely on sonar. Bats for example are almost all blind and guage their position relative to their prey based on how long it takes for their high pitched calls to bounce off surrounding objects and get back to them.
Using specialised equipment, you send out a pulses of sound. You have a collecting device where the echoing sound is picked up. You can therefore work out how long sound takes to travel to the reflecting object and back to you. If you know the velocity of sound in the medium, you can work out the distance travelled by the sound in that time and so the distance to the object is half that distance.