1. Vadim bought his wife a "gold" bracelet from a guy on the street for $100. If he drops it in a beaker of water and the volume raises 400 cm³ and the mass is determined to be 0.5 kg, then is the jewelry gold? If it is not gold then what do you think it is made of?

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2. In liquid A, a body floats with 9/10th of its volume immersed, while in liquid B it floats with 3/5th of its volume immersed. Compare the densities of the liquids.

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3. What is the density of a 7 kg solid cylinder that is 10 cm tall with radius 5 cm.

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4. Your friend of mass 80 kg float in fresh water. What her approximate volume. ( Human density is about 1000 kg/m³⁾

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5. A small ferry boat is 4.00 m wide and 6.00 m long. When a loaded car pulls onto it, the boat sinks an additional 4.00 cm into the water. What is the weight of the car?

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6. A rectangular air mattress is 2.0 m long, 0.50 m wide, and 0.08 m thick. the mattress is fully submerged. What the mass of the mattress?

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7. Calculate the mass flow rate (in grams per second) of blood ( = 1.0 g/cm3 ) in an aorta with a cross-sectional area of 2.0 cm2 if the flow speed is 40 cm/s.

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8. An object weighing 300 N and the volume of 0.5 m³ in air is immersed in oil after being tied to a string connected to a balance. The scale now reads 275 N. Find the density of the oil.

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(Important! please type the answers out, next to or under Key Idea, Stock of Data, Solution, Sanity Check in and not use pictures or write it in pen or pencil, e.g. "6. Key Idea: To find the mass of the submerged air mattress...")