Distinguish between Newtonian and non-Newtonian fluids.
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- Why is force exerted by static fluids always perpendicular to a surface?A brick is thrown into a deep swimming pool. As it sinks deeper and deeper into the water, does the buoyant force on it increase or Decrease? Explain.VISCOUS FLOW : Poiseuille’s law, Stokes law or Reynolds Number One way to administer an inoculation is with a “gun” that shoots the vaccine through a narrow opening. No needle is necessary, for the vaccine emerges with sufficient speed to pass directly into the tissue beneath the skin. The speed is high, because the vaccine ( = 1100 kg/m3) is held in a reservoir where a high pressure pushes it out. The pressure on the surface of the vaccine in one gun is 4.1 x 106 Pa above the atmospheric pressure outside the narrow opening. The dosage is small enough that the vaccine’s surface in the reservoir is nearly stationary during an inoculation. The vertical height between the vaccine’s surface in the reservoir and the opening can be ignored. Find the speed at which the vaccine emerges.
- As a fuel saving measure, commercial jets cruise at an altitude of about 10 km. While cruising at an altitude of 10 km, a small leak occurs in one of the window seals in the passenger compartment of an Airbus. Within the passenger compartment, the pressure and temperature are, respectively, 1.01 atm and 20°C and the pressure outside the craft is 0.311 atm. Model the air as an ideal fluid to find the speed (in m/s) of the stream of air flowing through the leak. (Assume the density of air to be 1.20 kg/m³.) m/sYou were told not to stand so close to a rapidly moving train because you might get sucked under it. What do you think will likely happen to you? Select one: The moving train could actually suck anybody closer to it. The moving train could be out of its way and will hit you. Greater pressure behind you will push you toward the moving train. Greater pressure between you and the train will pull you toward the train.hi pls answer thank you!
- . As per our discussion of Torricelli's law, consider that a rock is dropped into a container before a hole is made at the y=0 level. When the hole is made, does the water emerge with a speed that is greater than, less than or equal to the speed without the rock? Explain your answer.•35 Three children, each of weight 356 N, make a log raft by lashing together logs of diameter 0.30 m and length 1.80 m. How many logs will be needed to keep them afloat in fresh water? Take the den- sity of the logs to be 800 kg/m?.Consider a spherical ash particle of diameter 65 µm, falling from a volcano at a high elevation in air whose temperature is −50°C and whose pressure is 55 kPa. The density of air is 0.8588 kg/m3 and its viscosity is 1.474 × 10−5 kg/m⋅s. The density of the particle is 1240 kg/m3. The drag force on a sphere in creeping flow is given by FD = 3??VD. The terminal velocity of this particle at this altitude is (a) 0.096 m/s (b) 0.123 m/s (c) 0.194 m/s (d ) 0.225 m/s (e) 0.276 m/s