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Practice Quiz 3: Material and Fluid Properties, Bernouilli Due Dec 24 at 11a.m. Points 15 Questions 14 Available Oct 2 at 12p.m. - Dec 24 at 11a.m. Time Limit None Allowed Attempts Unlimited Instructions Copy of Quiz 3
Attempt History Attempt Time Score LATEST Attempt 1 less than 1 minute 0 out of 15 Submitted Dec 9 at 1:13p.m. Take the Quiz Again 0 / 1 pts Question 1 nanswered nanswered The stress-strain curve of a sample of an arterial wall is as follows:
Which of the following statements describing this response is true? Initially, small stresses give small extensions. At higher strains, the stiffness increases. orrect Answer orrect Answer
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Initially, small stresses give large extensions. orrect Answer orrect Answer At higher strains, the stiffness decreases. 0 / 1 pts Question 2 nanswered nanswered The stress-strain response of rat tail tendon throughout development is given below:
From this data, which of the following statements are true? Older rat tail tendons have a higher tensile strength. orrect Answer orrect Answer
Extensibility increases with age. Younger rat tail tendons have a higher tensile strength. Extensibility decreases with age. orrect Answer orrect Answer 0 / 1 pts Question 3 nanswered nanswered The results of tension tests on bovine horn sheath under different hydration conditions is given below (Li et al., 2010).
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Which hydration condition gives the horn sheath the greatest toughness? 19% 0%
8% orrect Answer orrect Answer they have equal toughness 0 / 1 pts Question 4 nanswered nanswered The stress-strain response of cyclical loading and unloading on an arterial wall sample to different maximum stresses is as follows:
Curves have been offset for clarity - solid lines indicate extension, dashed lines contraction.
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Which of the following is true? As you increase the maximum stress on the sample, the resilience substantially decreases. As you increase the maximum stress on the sample, the resilience substantially increases. As you increase the maximum stress on the sample, the resilience stays roughly the same. orrect Answer orrect Answer 0 / 1 pts Question 5 nanswered nanswered
If you apply a sudden constant stress to a sample of tissue from human spinal disks (a viscoelastic material): Which of the following strain responses would you expect to see? A) B) C) C
B orrect Answer orrect Answer A 0 / 1 pts Question 6 nanswered nanswered A bearded vulture, Gypaetus barbatus , carries a 4kg bone to a height of 150m and holds it stationary. It then drops drops the bone to break it open. What is the velocity of the bone right before it hits the ground? Neglect the effects of air friction.
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*** Give your answer in [m/s] rounded to 2 decimal places *** Hint: Use gravitational acceleration
ou Answered ou Answered orrect Answers orrect Answers 54.25 (with margin: 0.2) 0 / 1 pts Question 7 nanswered nanswered Bull kelp possess pneumatocysts, gas-filled floats that help their fronds float to the surface. Their internal pressure of a pneumatocyst is 80 kPa (i.e., sub-atmospheric), and they can be crushed when the pressure difference across the pneumatocyst wall exceeds 380 kPa. Assuming , sea water , and , what is the depth at which a kelp pneumatocyst would be crushed? *** Give your answer in m rounded to 2 decimal places.
ou Answered ou Answered orrect Answers orrect Answers 35.67 (with margin: 0.1) 0 / 1 pts Question 8 nanswered nanswered If you have three (2D) fish tanks filled with water. If the exact same fish is stationary at the location indicated in the picture below, what is the total pressure felt on the fish from highest to lowest?
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B>A>C A=B=C C>A=B orrect Answer orrect Answer C>B>A
0 / 1 pts Question 9 nanswered nanswered According to this shear stress-shear rate data (https://canvas.ubc.ca/courses/122613/files/28288634/download?wrap=1) (https://canvas.ubc.ca/courses/122613/files/28288634/download? download_frd=1) for lava flow, what type of fluid is this? Shear Thickening Bingham Plastic orrect Answer orrect Answer Shear Thinning Newtonian
0 / 1 pts Question 10 nanswered nanswered Based on the data in question 9, what is the viscosity of the lava once it has passed its yield point? *** Give your answer in Pa s ou Answered ou Answered orrect Answers orrect Answers 35,800 (with margin: 0) 0 / 2 pts Question 11 nanswered nanswered You collect a sample of liquid sap oozing from a tree and wish to determine its dynamic viscosity ( ). You place a droplet of this liquid on a flat surface, beneath a 8 cm plate, forming a thin film 1 mm thick. Using a 2
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Answer 1: Answer 2: force gauge, stop watch and ruler you determine that when you apply a constant force of 0.03 N parallel to the surface of the plate, it slides along at a constant velocity of 25 cm s . What is the shear stress ( ) being applied to the fluid ? Give your answer in Pa to 1 decimal place: Pa What is the dynamic viscosity of this material? Give your answer in Pa s to 2 decimal places: Pa s **Base SI units matter! -1 (You left this blank) ou Answered ou Answered 37.5 orrect Answer orrect Answer
(You left this blank) ou Answered ou Answered 0.15 orrect Answer orrect Answer 0 / 1 pts Question 12 nanswered nanswered Based on the dynamic viscosity you calculated for the tree sap, and the table below, which of these is correct: Fluid at room temp. Dynamic viscosity (Pa s) Water 10 Olive oil 10 Glycerol 10 Liquid honey 10 -3 -1 0 1 The tree sap has a viscosity about the same as glycerol
The tree sap has a viscosity about the same as olive oil orrect Answer orrect Answer The tree sap has a viscosity about the same as honey The tree sap has a viscosity about the same as water 0 / 1 pts Question 13 nanswered nanswered You are at a remote field station conducting research when you break your mercury barometer. You know that you can make a simple barometer by closing one end of a tube, filling it with liquid, then standing the tube vertically with its open end submerged in a dish of the liquid (see pic below). The pressure of the atmosphere on the liquid in the dish balances the hydrostatic pressure of the vertical liquid column in the tube. You don't have any more mercury, but you do have some Galinstan, a liquid metal alloy with a density of 6,440 kg/m . How tall a tube will you need to fill with 3
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Galinstan to produce a barometer capable of measuring up to 105 kPa of atmospheric pressure? Give the tube height in m to 2 decimal places ou Answered ou Answered
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orrect Answers orrect Answers 1.66 (with margin: 0) 0 / 1 pts Question 14 Answer 1: nanswered nanswered You collect a sample of tissue from the stomach lining of a cow and record its dimensions as L = 12.0 cm, cross-sectional area 5 mm . You then hang a 5 g weight from the end of the material and determine its new total length is 12.2 cm. What is the stress (in kPa) and strain (dimensionless) on the material? Stress : kPa (to two decimal places) Strain : (to three decimal places) 2
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Answer 2: (You left this blank) ou Answered ou Answered 9.81 orrect Answer orrect Answer (You left this blank) ou Answered ou Answered 0.017 orrect Answer orrect Answer .017 orrect Answer orrect Answer 1.67 orrect Answer orrect Answer
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