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Hold Up a Minute! After the question is read, teams will have one minute to confer. Teams will have two minutes when a calculation is necessary. When time is called, no passing of notes or talking is permitted. Once the spinner has been spun, the team member of that color has 15 seconds to write the solution on his whiteboard. Only the team member designated by the color shown on the spinner may be recognized and write the solution on his white board. Whiteboards and capped markers must be placed on the desk when not in use.

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1. The reason objects immersed in a fluid experience an upward buoyant force is because: a)The fluid exerts equal pressure on all parts of an object. b)The fluid exerts greater pressure on the bottom of an object. c)The density of the object is greater than the density of the liquid. (B)

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2. A 10 ton sunken ship displaces _______ of fluid. a)Less than 10 tons. b)Exactly 10 tons. c)More than 10 tons. (A)

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3. A 10 ton floating ship displaces _______ of fluid. a)Less than 10 tons. b)Exactly 10 tons. c)More than 10 tons. (b)

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4. A hydraulic arrangement consists of a water filled U tube that is wider on one end than the other. Pistons are fitted on both ends. To multiply an input force, the input end should be the one having the: a)Larger diameter piston b)Smaller diameter piston c)It doesnt matter what size the piston is. (b)

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Calculation: two minutes 5.What volume of water will be displaced by a floating 2kg mass? a) 1/500 cubic meters b) 0.2 cubic meters c)1.96 cubic meters d) 200 cubic meters (a)

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Calculation: two minutes 6. A floating object will displace 0.25 m 3 of water. What is the mass of the object? a) cannot be determined b) 2.5 kg c) 25.0 kg d) 250.0 kg (d)

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7. A submerged submarine accelerates towards the surface. This can happen because at that moment, the a) density of the sub is less than the density of the fluid. b) density of the sub is equal to the density of the fluid. c) density of the sub is greater than the density of the fluid. (a)

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8. An egg is placed in a bowl of water. Salt is slowly added to the water until the egg rises and floats. This is because: a) the calcium in the eggshell is repelled by the calcium chloride. b) the salt sinks to the bottom. c) the density of saltwater equals the density of the egg. d) the density of the saltwater exceeds the density of the egg. (d)

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9. As a helium filled balloon rises, its: a) Volume increases. b) Volume decreases. c) Volume remains the same. (b)

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Calculation: three minutes 10. A diver in the Pacific Ocean experiences a pressure of 1,126,000 Pa. How deep is the diver? Use 1025 kg/m 3 as the density of saltwater, recall that atmospheric pressure is 101, 000 Pa, and use 10 m/s/s for g. (h = 100m)

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Unit 1 Lesson 5 Fluids and Pressure

Unit 1 Lesson 5 Fluids and Pressure

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