Objective 5:
1. The relationship described in Boyle's Law is between the volume and the pressure of a gas.
2. Scientists only HALF fill high-altitude balloons because as the altitude increases, the pressure decreases. This causes the balloon to get bigger (because volume and pressure are related *when pressure decreases, volume increases*), so if you fill it up all the way, when it expands it will pop.
3. The formula for Boyle's Law is: PV=k. P is pressure of the system, V is volume of the gas, and k is a constant value (of the pressure and volume.)
4. Boyle's Law is useful for physicians because, when they put patients on oxygen (like on the tanks), then they can see how much is in tank so they know when to refill it. They find this out by multiplying the pressure of the oxygen tank by the volume of the tank and find out how much there is / needs to be.
5. Scuba divers use Boyle's Law in the same way that doctors do. When they go underwater, they carry oxygen tanks. They use Boyle's Law to see how much oxygen they have / need.
Citations:
http://en.wikipedia.org/wiki/Boyle's_law
http://wiki.answers.com/Q/Why_do_most_helium_filled_balloons_burst_as_they_ascend_to_high_altitudes
http://wiki.answers.com/Q/What_is_the_formula_of_Boyle's_law
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