Depth and Pressure Practice Problems Name: Physics Period: 1. A pipe breaks in the bathroom, flooding the entire room to a depth of 5 cm. Is there more pressure exerted on the floor of the bathroom, or on the bottom of the 6 cm deep cup of water sitting on the counter? Explain. 2. Karen is building a sandcastle at the beach. She carries her pail to the ocean to fill it up with sea water. (a) While her pail is empty, how much pressure (b) When she fills her pail, the water in it is 25 is exerted on the bottom of her pail? From cm deep. How much pressure does the sea what? water exert on the bottom of the full pail? (c) How much force is exerted on the bottom of (d) Next time, instead of making the walk down the full pail, which has a radius of 18 cm? to the ocean, Karen fills up her pail with water from her water bottle. How much pressure does the bottom of her pail experience? 3. Tyler, having heard that there is treasure at the bottom of Lake Oswego, decides to go diving there after school. He puts on a 0.08 m2 mask, trapping a 0.008 m3 volume of air between his face and the mask. (a) He swims to a depth of 3 meters. What (b) He dives deeper, reaching the bottom at a pressure does he experience? depth of 9 meters. What pressure does he experience? (c) What is the net force on Tyler’s mask while he probes the bottom of the lake? 4. In an experiment, Marcus is trying to turn pennies into gold. He fills up a 12 cm tall beaker with acetic acid, drops in a penny, and watches it fall to the bottom. (a) How much pressure is exerted on the penny as it sits on the bottom? (b) While he waits for the results, he decides to also try dropping the penny in a beaker of citric acid. If he wants the penny to be under the same pressure as the other penny in the acetic acid, to what depth should he fill the new beaker with citric acid?
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