15 litres
As you ascend from diving the surrounding water pressure decreases. This means if you hold your breath and ascend the pressure on your body decreases so your lungs start to inflate until........pop
You'll either have to hold your breath or have a SCUBA tank.
by blocking a standard water pipe
It depends on the bucket size, but usually a standard size bucket would hold a few litters of water.
you die.
No, no mammals don't have gills, and can't breathe under water. Mammals have lungs, breathe air and have to hold their breath when diving.
Birds hold their breath when they are drinking or diving to catch fish.
Orcas - killer whales don't Breathe under water. They are mammals and Breathe air with lungs. They hold their breath when diving.
In order to solve this problem, you need to know how deep the pool is.
18 standard cooking teaspoons will hold 90 ml of water.
standard glass is 8oz, but it would depend on the glass.
Stream lined your equipment as well as yourself while diving ie make sure your equip isn't hanging and hold your hands, fingers interlaced at your waist