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## How many gallons of water is in a pipe?

Volume and Weight of Water for Common Pipe Sizes

Pipe Size Volume
in in3/ft gallons/ft
3/4“ 5.301 in3 0.0229 gal
1″ 9.425 in3 0.0408 gal
1 1/4“ 14.726 in3 0.0637 gal

## What is the water pressure at 100 feet?

Water Tower Example. If the top of a full water tank is 100 feet above the ground, the 100 ft. of water causes 100 ft. x 0.433 psi per ft. of column or 43.3 psi pressure at ground level.

## At what depth will water pressure kill you?

In short: most of the body can handle any pressure, but if we’re breathing air the maximum safe depth is about 60 meters (190 feet), the feasible maximum with current technical capabilities (and special breathing gases) is about 500 meters (but, for safety reasons, those depths have only been simulated).

## What is crush depth for a human?

Human bone crushes at about 11159 kg per square inch. This means we’d have to dive to about 35.5 km depth before bone crushes. This is three times as deep as the deepest point in our ocean.

## How deep underwater can a human survive?

Deep diving is defined as a dive that exceeds 60 feet (18.28 metres). That means that most people can dive up to a maximum of 60 feet safely. For most swimmers, a depth of 20 feet (6.09 metres) is the most they will free dive.

## Is scuba diving dangerous at 30 feet?

One of the greatest scuba diving dangers at 30 feet is an arterial gas embolism. This is because the biggest change in pressure occurs in the first 10 metres (32 feet) of water. The water pressure at 30 feet is twice that of what it is on the surface.

## What is the most common injury in scuba diving?

The most common injury in divers is ear barotrauma (Box 3-03). On descent, failure to equalize pressure changes within the middle ear space creates a pressure gradient across the eardrum.

## How long can you dive at 50 feet?

Assuming the dive is your first (no residual nitrogen) you can dive at 50 ft. for 80 min with no decompression according to PADI and NAUI tables. You should always do a safety stop for 1-5 min at 10-20 ft.

## At what age should you stop scuba diving?

There is no maximum age for starting to or continuing to dive. Whether you are 60, 75, or 96 years old, scuba diving is a sport that will keep you in great shape and offer incredible experiences. Good news, even if you’re 60+ years old, scuba diving is a great sport for you!

## What is the number one rule of scuba diving?

Always breathe continuously. Never hold your breath. As I mentioned earlier, this is arguably the “number one rule” of scuba because breath holding while scuba diving can lead to serious injury, even death.

## What country is best for scuba diving?

Top 10 Countries to Go Scuba Diving in the World

1. Australia. Millions of tourists head Down Under to Australia every year and this country has some of the best dive sites in the world.
2. Egypt.
3. USA.
4. Honduras.
5. Thailand.
6. Belize.
7. Galapagos Islands.
8. South Africa.

## Is scuba diving dangerous?

Diving does entail some risk. Not to frighten you, but these risks include decompression sickness (DCS, the “bends”), arterial air embolism, and of course drowning. There are also effects of diving, such as nitrogen narcosis, that can contribute to the cause of these problems.

## How do most divers die?

The most common injuries and causes of death were drowning or asphyxia due to inhalation of water, air embolism and cardiac events. Risk of cardiac arrest is greater for older divers, and greater for men than women, although the risks are equal by age 65.

## Do sharks ever attack scuba divers?

Yes, sharks do attack divers, whether provoked or unprovoked. However, attacks are extremely rare, as sharks don’t view scuba divers as a particularly appetizing prey.

## Why do sharks not bite divers?

The most common reason is likely to be that they get confused. Surfers or swimmers are mistaken for more natural prey such as seals, which spend a lot of time on the surface. The chances are the shark just takes a single bite then realizes its mistake.

## Are Sharks safe to swim with?

While they are not as dangerous as films and popular-culture might have you believe, they are also not safe animals to be around without adequate protection. Some divers can swim with great white sharks without a cage, but their protection comes from knowledge of great white behaviours and body language.

## Why do scuba divers fall backwards?

Scuba divers roll off boats backwards so as not to dislodge their facemask or regulator (the thing they breathe through). Because if they fell the other way they would fall into the boat.

## Why is Blue Hole so dangerous?

So, why is the Great Blue Hole so dangerous? The Great Blue Hole of Belize is dangerous for three reasons: the inexperienced divers, water clarity, and the presence of sharks. Those three elements can alter the mindset of the divers and push them to make bad decisions while scuba diving.

## Why do scuba divers go in the water backwards?

Just like using a diver down flag, diving back into the water is a standard safety technique. Backward diving allows scuba divers to keep a hand on their gear while entering the water to avoid losing a mask or getting lines tangled.

## How many divers die each year?

Every year approximately 100 people die in North America while diving, and another 100 die while diving in the rest of the world. Diving is a relatively high ‘risk’ activity.

## What is the formula for calculating flow rate?

Q=Vt Q = V t , where V is the volume and t is the elapsed time. The SI unit for flow rate is m3/s, but a number of other units for Q are in common use. For example, the heart of a resting adult pumps blood at a rate of 5.00 liters per minute (L/min).

## How do you calculate discharge?

Discharge = V x D x W If length is measured in feet and time in seconds, Discharge has units of feet3/sec or cubic feet per second (cfs). Depth times Width gives the cross-sectional area.

## What is acceptable water flow rate?

about 6 to 12 gallons per minute

## How many GPM can a 1/2 pipe handle?

Metric PVC Pipe

Assume Average Pressure. (20-100PSI) About 12f/s flow velocity
1/2″ .50-.60″ 14 gpm
3/4″ .75-.85″ 23 gpm
1″ 1.00-1.03″ 37 gpm
1.25″ 1.25-1.36″ 62 gpm

## How do you increase your flow rate?

water flow in a pipe can be increased by increasing the pressure difference between the two ends of the pipe and decreasing the frictional loss by using a smooth pipe.

## What happens when flow rate increases?

As the flow rate increases, the maximum solid temperature decreases which means better micro-channel cooling performance. However, increase in fluid flow rate also leads to increase in pumping power (see Eqns (17), (18), and (24)).

## Does pressure affect flow rate?

Flow rate is the effect. Higher pressure causes increased flow rate. If the flow rate increases, it is caused by increased pressure.

2021-02-10