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- Please help thank you!6. A rock with a mass of 540 g in air is found to have an apparent mass of 300 g when submerged in water with a density of 997 kg/m³. (a) What mass of water is displaced? (b) What is the volume of the rock? (c) What is the average density of the rock?2. A rectangular biock with a base area of 25 cm2 is submerged in water of density 1000kg/m3 a. Find the (i) pressure p,, due to the water acting on the top surface of the block (ii) Pressure p, due to the water acting on the bottom surface of the block. b. Calculate the (i) force exerted by the water on the top surface of the block, (i) Force exerted by the water on the bottom surface of the block.
- 6. A solid aluminum bar weighs 89 N in air. a. What is its volume? b. If it is suspended from a rope and totally submerged in water, what is the tension in the rope?The gravitational force exerted on a solid object is 5 N. When the object is suspended from a spring scale and submerged in water, the scale reads 3.5 N. Find the density of the object.8. A rock is suspended by a lightweight string. When the rock is in the air, the tension in the string is 39.2 N. When the rock is totally submerged in water, the tension is 28.4 N. When the rock is totally submerged in an unknown liquid, the tension is 21.5 N. What is the density of the unknown liquid?
- 9. A chunk of iron with a mass of 400.0g in air is found to have an apparent mass of 354g when completely submerged in an unknown liquid. (I) What mass of the liquid does the iron displace? (II) What is the density of the fluid? Density of iron = 7.8 g/cm.3. What fraction of a piece of iron will be submerged when it floats in mercury? 4. A nozzle with a diameter of 0.500 cm is attached to a garden hose with a radius of 0.900 cm where water flows at 1.96 m/s. Calculate the pressure in the hose, given that the absolute pressure in the nozzle is 1.01x10°N/m² and assuming level, frictionless flow.