why are scuba tanks stored in the shade rather than the sun? use a gas law to explain your answer.

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# Brief Explanations:
The ideal gas law (or Gay - Lussac's Law, a special case of the ideal gas law when volume is constant, $ \frac{P_1}{T_1}=\frac{P_2}{T_2} $) explains this. SCUBA tanks have a fixed volume. When a tank is in the sun, the temperature ($ T $) of the gas inside increases. According to the gas law, if volume ($ V $) is constant (tank volume doesn't change) and the amount of gas ($ n $) is constant, an increase in temperature leads to an increase in pressure ($ P $) (from $ PV = nRT $, if $ V $, $ n $, $ R $ are constant, $ P\propto T $). High pressure can cause the tank to rupture, so storing in the shade keeps the temperature low, preventing excessive pressure build - up.
# Answer:
SCUBA tanks are stored in the shade because of the ideal gas law ($ PV = nRT $) (or Gay - Lussac's Law for constant volume: $ \frac{P_1}{T_1}=\frac{P_2}{T_2} $). The tank has a fixed volume ($ V $) and fixed amount of gas ($ n $). Sunlight increases the temperature ($ T $) of the gas inside. Since $ P\propto T $ (at constant $ V $ and $ n $), higher temperature raises the pressure ($ P $) of the gas. Excessive pressure could rupture the tank, so storing in the shade keeps temperature (and thus pressure) low to avoid damage.

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