Physics
Any object, totally or partially immersed in a fluid or liquid, is buoyed up by a force equal to the weight of the fluid displaced by the object. Also known as the principle of floatation.
What is Archimedes Principle?
To prevent back injuries while lifting scuba gear always do this.
What is lift with your legs?
Entanglement can be mitigated if you have either of these two tools.
What is a dive knife and shears/scissors?
Shuffling your feet along the sandy bottom can allow this creature to feel the vibrations from your feet and have a chance to flee before inflicting an accidental sting.
What is a Stingray?
The most common diving related injury.
What is Ear Barotrauma?
The total pressure of a mixture of gases is equal to the sum of the partial pressures of the individual component gases, which explains “Gas Narcosis”
What is Dalton’s Law?
3points of contact on a boat assists in preventing these types of injury.
What is Slips and Falls?
How often should scuba tanks be hydrostatically tested and visually inspected?
What is every 5 years and annually?
Studies show that this substance neutralizes jellyfish stings on skin.
What is Vinegar?
“Rapture of the deep” or a reversible alteration in consciousness caused by the diver breathing gases at high pressure common at 100feet or greater.
What is Gas Narcosis?
The volume of a given mass of gas varies directly with the absolute temperature of the gas when pressure is kept constant. Helps divers understand the hazards of leaving scuba tanks out in the hot sun, or why we should never leave tanks in the trunk of a hot car.
What is Charle’s Law?
Never dive directly under the hull of a boat or this may injure you.
What is a Boat Propeller?
Regulators are a diver’s life support system. How often should these be inspected and serviced?
What is annually or according to the manufacturer recommendation?
Sharp spines from this creature easily penetrate skin, wetsuits and booties and are brittle enough to break off once embedded.
What is Sea Urchins?
First aid for divers suspected of decompression sickness should be administered this.
What is 100% Oxygen?
A gas's pressure and volume are inversely proportional. If a diver takes a lungful of air from a scuba cylinder at depth, that air will expand while ascending to the surface. Never Hold Your Breath!
What is Boyle’s Law?
Dive gear not stored properly under a seat on a boat can cause this.
What is a Trip Hazard?
To keep yourself positively buoyant at the surface during an emergency remove this and inflate this.
What is a weight system and buoyancy compensating device?
Surf and surge in shallow water or poor buoyancy control over reefs can result in scrapes and cuts from this stinging coral.
What is Fire Coral?
Gas supply rule planned for the outward journey, the return journey and a safety reserve.
What is the Rule of 3rds.
The quantity of a gas that will dissolve in a liquid is proportional to the partial pressure of the gas and its solubility. Soft drinks makes a hissing sound when the cap is removed and the CO2 is disolved for as long as the cap is on the bottle. Once the cap is removed, the pressure decreases and the gas bubble out of the drink.
What is Henry’s Law?
It is recommended by PADI to ascend within how many feet of a dive flag to prevent getting injured by a boat underway.
What is 50 feet?
Attaching this device to yourself on the surface can be fatal if a boat is coming straight at you.
What is a Surface Marker Buoy?
Name this creature.
What s a Bearded Fire Worm or Bristle Worm?
An emergency cylinder of air or other breathing gas, aimed to use in case of air supply trouble.
What is a Bailout Bottle?