Question 1 (1 point) A 0.78-kg block of wood is floating in water. Determine the magnitude of the buoyant force in SI units acting on the block (given: g = 9.81 m/s=). Be accurate to 3 decimal places. Your Answer: AnswerQuestion 2 (1 point) A rock with a volume of 1.38 m is fully submerged in water having a density of 1000 kg/m . What is the buoyant force in SI units acting on the rock (given: g = 9.8 m/52)? Be accurate to the nearest one. Your Answer: AnswerQuestion 3 (1 point) A block of wood of uniform density floats so that 0.43 of its volume is underwater. The density of water is 1000 kg/m". What is the density of the block in SI units and accurate to + 1? Your Answer: Answer Question 4 (1 point) The load-bearing piston in a certain hydraulic system has an area 30 times as large as the input piston. If the larger piston supports a load of 6340 N, how large a force in SI units (to 2 decimals) must be applied to the input piston? Make your answer accurate to 2 decimal places. Your Answer: Answer Question 5 (1 point) With the temperature held constant, the pressure of a gas in a cylinder with a movable piston is increased from 20 kPa to 40 kPa. The initial volume of the gas in the cylinder is 0.79 m . What is the final volume of the gas in SI units after the pressure is increased? Be accurate to 3 decimal places. Your Answer: AnswerQuestion 6 (1 point) The density of aluminum is 2700 kg/m . An aluminum block has a mass of 2.5 kg. The buoyant force exerted on this block when it is completely submerged in water of density 1000 kg/m is approximately: 0.93 N. 24.5 N. 2.5 N. 0.0091 N. 91 N. Question 7 (1 point) A stream moving with a speed of 2.5 m/s reaches a point where the cross-sectional area of the stream decreases to one half of the original area. What is the speed of the water (in SI units) in this narrowed portion of the stream? Be accurate to one decimal place. Your Answer: Answer Question 8 (1 point) Water emerges from a faucet at a speed of 1.28 m/s. After falling a short distance, its speed increases to 3.6 m/s as a result of the gravitational acceleration. By what number should the original cross-sectional area of the stream be multiplied to find the area at the lower position? Be accurate to 4 decimal places. Your Answer: AnswerQuestion 9 [1 point} The equation of continuity is a consequence of conservation of 0 energy. 0 velocity. 0 momentum. 0 mass. Question 10 {1 pointi An airplane wing with an average cross-sectional area of 8 n12 experiences a lift force of 80000 N. What is the difference in air pressure. on an average. between the bottom and the too of the wing? The difference in air pressure between the bottom and the top of the wing is 1000 Pa. O The difference in air pressure between the bottom and the top of the wing is 80000 Pa. O The difference in air pressure between the bottom and the top of the wing is 8000 Pa. The difference in air pressure between the bottom and the top of the wing is 10000 Pa