Below is the stress-strain curves of four different materials (A, B, C, and D). Make a brief interpretation of each curve, and rank the materials based on its rigidity. STRAIN Illustrate and solve the following problems on fluids. 1. How much buoyant force acts on a 12 kg object if it displaced 0.5 m³ of water? Will it float? 2. Fluid flows in a pipe of different radii: point A - 3 cm; point B - 1 cm; point C - 5 cm. If the speed of water that flows at point A is 8 m/s, find the water speed at other points (B and C) in the pipe. STRESSS

Below is the stress-strain curves of four different materials (A, B, C, and D). Make a brief interpretation of each curve, and rank the materials based on its rigidity. STRAIN Illustrate and solve the following problems on fluids. 1. How much buoyant force acts on a 12 kg object if it displaced 0.5 m³ of water? Will it float? 2. Fluid flows in a pipe of different radii: point A - 3 cm; point B - 1 cm; point C - 5 cm. If the speed of water that flows at point A is 8 m/s, find the water speed at other points (B and C) in the pipe. STRESSS

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter14: Fluid Mechanics

Section: Chapter Questions

Problem 36CQ: Explain why the viscosity of a liquid decreases with temperature, that is, how might an increase in...

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Many figures in the text show streamlines. Explain why fluid velocity is greatest where streamlines are closest together. (Hint: Consider the relationship between fluid velocity and the cross-sectional area through which it flows.)
Explain why the viscosity of a liquid decreases with temperature, that is, how might an increase in temperature reduce the effects of cohesive forces in a liquid? Also explain why the viscosity of a gas increases with temperature, that is, how does increased gas temperature create more collisions between atoms and molecules?
(a) Using Bernoulli's equation, show that be measured fluid speed v for a pitot tube, like the one in figure 14.32(b), is given by v=( 2gh)1/h , where h is be height of be manometer fluid, p' is the density of the manometer fluid, p is the density of the moving fluid, and g is be acceleration due to gravity. (Note that v is indeed proportional to the square root of h, as stated in text) (b) Calculate v for moving air if a mercury manometer's h is 0.200 m. Figure 14.32 Measurement of fluid speed on Bernoulli’s principle. (a) A manometer is connected to two tubes close together and small enough not to disturb the flow. Tube 1 is open at the end facing the flow. A dead spot having zero speed is created there. Tube 2 has an opening on the side, so the fluid has a speed v across; thus, pressure there drops. The difference in pressure at the manometer is 12v22 , so h is proportional to . 12v22 (b) This type of velocity measuring device is a Prandtl tube, also known as a pitot tube.
(a) Calculate the buoyant force on a 2.00-L helium balloon. (b) Given the mass of the rubber in the balloon is 1.50 g, what is the net vertical force on the balloon if it is let go? You can neglect the volume of the rubber.
(a) Is the buoyant force a conservative force? (b) Is a potential energy associated with the buoyant force? (c) Explain your answers to parts (a) and (b).
Explain why the viscosity of a liquid decreases with temperature—that is, how might increased temperature reduce the effects of cohesive forces in a liquid? Also explain why the viscosity of a gas increases with temperature—that is, how does increased gas temperature create more collisions between atoms and molecules?
a) What is a fluid? Discuss some examples of fluids and give an example each b) Draw a graph (not to scale) depicting the relationship between shear stress and shear rate of the fluids discussed above c) Describe what happens to blood at both low and high shear rates. d) What is the law that differentiates Newtonian fluids from Non-Newtonian fluids?
Consider the sealed containers (same fluid and on the same ground level) below with heights given in ? and ? values. Provided that ? = 2?, answer the following items. Suppose the bottom pressure is evaluated, what container experiences the second highest pressure? A. Container AB. Container BC. Container CD. Container D
How to calculate: Consider three poles with circular cross sections. There cross sectional radii (r) and masses (m) described below. Which one exerts largest pressure on the ground if poles stand on their circular edges. Which one exerts the least pressure? a. Pole 1: r=2.25 cm, m=200 kg b. Pole 2: r=2.75 cm, m=250 kg c. Pole 3: r=3.25 cm, m=300 kg Given that area of a circle is r^2 where r is the radius.
MC Physics 1180 Fluids and Solids 1. A block of wood has specific gravity 0.860. When placed in water, what percent of the volume of the wood is above the surface. 2. Define Stress is the force Per unit area causing deformation. 3. Define Strain - is a measure of the amount of the deformation. 4. Define each type of modulus. 5. Legend says that Archimedes, in determining whether or not the king's crown was made of pure gold, measured its volume by the water displacement method. If the density of gold is 19.3 g/cm³ and the crown's mass is 579 g, what volume would be necessary to prove that it is pure gold? 6. A block of wood has specific gravity 0.650. When placed in water, what percent of the volume of the wood is under the surface? 7. a) b) c) d) 8. a 9 Describe these states of matter. What relative temperatures are associated with them? liquid. plasma. gas. solid. A block of wood has a density 0.520 g/cm³ and mass 3,900 g. It floats in a container of oil (the oil's density is 0.850…
Consider the sealed containers (same fluid and on the same ground level) below with heights given in a and b values.Provided that b = 2a, answer the following items. Suppose the bottom pressure is evaluated, what container experiences the second highest pressure? A. Container AB. Container BC. Container CD. Container D
What to do: Consider the two identical blocks with the same mass shown below and answer the questions that follow. Write your answers in a separate sheet of paper. B A Guide questions: 1. Which block exerts greater force on the surface? Why? 2. Which block has greater area of contact with the surface? 3. Which block exerts greater pressure? Why?