You must look down at the wall and your feet cannot leave the starting block until the other swimmer's hand touches the wall. That is why the lane judge walks up next to the starting block and watches to see the swimmers hand touch the wall in order to make sure the next swimmer does not leave early.
on the wall their is a touch pad and when touched it goes off it is all recorded electronically, when near the end watch the side of the starting block a light will flash red.
Able bodied swimming and dissability swimming is different as where people have missing limbs extra, the rules that apply in able bodied swimming cannot apply in dissability swimming. For example, on butterfly and breaststroke, the swimmer must touch each wall with both hands, but in a dissability meet, the swimmer would not be able to do this if they only hadhalf anarm. However the swimmer still has to push their half arm foreward as if they were going to touch the wall, but once their other handhas touched, they can turn. Hope this answered your question :)
soft tissue and muscle. i think.... The outside wall of a hoof is keratin--same as fingernails.
Well firstly it is the dive or a push off the wall that creates the momentum for the swimmer to go in a forward direction. this can be helped if the swimmer is in a streamline position. After that it is the pull and kick of the swimmer, how strong the swimmers pull and kick is depends on the speed.
Yes, they have touch sensors. There are timed touch sensors on the wall.
The ends of the lanes have touch pads or sensors that respond to contact or pressure from the swimmer. When they hit the wall it stops the timer. Im sure they use other methods too.
Two religious pictures by his fingernails.
if you dont touch the wall with both hands, you will DEFINITELY get disqualified
yes they put these electronic boards on the wall and it senses it when you touch it