COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 9, Problem 71QAP
To determine
The house compresses the supporting stack of the blocks.
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Q5/
A-
Assume a hand has a 1.1 m shaft of bone with an average cross-
sectional area of 25 x10-5 m². What is the amount of shortening when all of
the body mass of 75 Kg is supported on this hand?
Young's modulus= 1.8 x1010
B-How are the organs in the body (heart/lungs) work with out
friction??(explain)
+4* ) A timber beam consists of three 50 x 200-mm planks fas
Ltened together to form an I-beam 200 mm wide x 300 m
deep, as shown in Fig. P7-4. If the flexural stress at point Ad
the cross section is 7.5 MPa (T), determine
a. The flexural stress at point B of the cross'section
b. The flexural stress at point C of the cross section.
c. The flexural stress at point D of the cross section.
200 mm
A
50 mm
100 mm
200 mm
В
ND
50 mm
25 mm
Figure P7-4
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A moonshiner makes the error of filling a glass jar to the brim and capping it tightly. The moonshine expands more than the glass when it warms up,
in such a way that the volume increases by 0.3% (that is, AV/Vo = 3 x 10-3) relative to the space available. Calculate the force exerted by the
moonshine per square centimeter if the bulk modulus is 1.7 x 109 N/m2, assuming the jar does not break.
N/cm2
In view of your answer, do you think the jar survives? (Hint: How many atmospheres is this?)
O No
O Yes
Additional Materials
Chapter 9 Solutions
COLLEGE PHYSICS
Ch. 9 - Prob. 1QAPCh. 9 - Prob. 2QAPCh. 9 - Prob. 3QAPCh. 9 - Prob. 4QAPCh. 9 - Prob. 5QAPCh. 9 - Prob. 6QAPCh. 9 - Prob. 7QAPCh. 9 - Prob. 8QAPCh. 9 - Prob. 9QAPCh. 9 - Prob. 10QAP
Ch. 9 - Prob. 11QAPCh. 9 - Prob. 12QAPCh. 9 - Prob. 13QAPCh. 9 - Prob. 14QAPCh. 9 - Prob. 15QAPCh. 9 - Prob. 16QAPCh. 9 - Prob. 17QAPCh. 9 - Prob. 18QAPCh. 9 - Prob. 19QAPCh. 9 - Prob. 20QAPCh. 9 - Prob. 21QAPCh. 9 - Prob. 22QAPCh. 9 - Prob. 23QAPCh. 9 - Prob. 24QAPCh. 9 - Prob. 25QAPCh. 9 - Prob. 26QAPCh. 9 - Prob. 27QAPCh. 9 - Prob. 28QAPCh. 9 - Prob. 29QAPCh. 9 - Prob. 30QAPCh. 9 - Prob. 31QAPCh. 9 - Prob. 32QAPCh. 9 - Prob. 33QAPCh. 9 - Prob. 34QAPCh. 9 - Prob. 35QAPCh. 9 - Prob. 36QAPCh. 9 - Prob. 37QAPCh. 9 - Prob. 38QAPCh. 9 - Prob. 39QAPCh. 9 - Prob. 40QAPCh. 9 - Prob. 41QAPCh. 9 - Prob. 42QAPCh. 9 - Prob. 43QAPCh. 9 - Prob. 44QAPCh. 9 - Prob. 45QAPCh. 9 - Prob. 46QAPCh. 9 - Prob. 47QAPCh. 9 - Prob. 48QAPCh. 9 - Prob. 49QAPCh. 9 - Prob. 50QAPCh. 9 - Prob. 51QAPCh. 9 - Prob. 52QAPCh. 9 - Prob. 53QAPCh. 9 - Prob. 54QAPCh. 9 - Prob. 55QAPCh. 9 - Prob. 56QAPCh. 9 - Prob. 57QAPCh. 9 - Prob. 58QAPCh. 9 - Prob. 59QAPCh. 9 - Prob. 60QAPCh. 9 - Prob. 61QAPCh. 9 - Prob. 62QAPCh. 9 - Prob. 63QAPCh. 9 - Prob. 64QAPCh. 9 - Prob. 65QAPCh. 9 - Prob. 66QAPCh. 9 - Prob. 67QAPCh. 9 - Prob. 68QAPCh. 9 - Prob. 69QAPCh. 9 - Prob. 70QAPCh. 9 - Prob. 71QAPCh. 9 - Prob. 72QAPCh. 9 - Prob. 73QAPCh. 9 - Prob. 74QAPCh. 9 - Prob. 75QAPCh. 9 - Prob. 76QAPCh. 9 - Prob. 77QAPCh. 9 - Prob. 78QAPCh. 9 - Prob. 79QAPCh. 9 - Prob. 80QAPCh. 9 - Prob. 81QAP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Assume Youngs modulus for bone is 1.50 1010 N/m2. The bone breaks if stress greater than 1.50 108 N/m2 is imposed on it. (a) What is the maximum force that can be exerted on the femur bone in the leg if it has a minimum effective diameter of 2.50 cm? (b) If this much force is applied compressively, by how much does the 25.0-cm-long bone shorten?arrow_forwardAn aluminium (=2.7g/cm3) wire is suspended from the ceiling and hangs vertically. How long must the wire be before the stress at its upper end reaches the proportionality limit, which is 8.0107N/m2 ?arrow_forward(a) Estimate the force with which a karate master strikes a board, assuming the hands speed at the moment of impact is 10.0 m/s and decreases to 1.00 m/s during a 0.002 00-s time interval of contact between the hand and the board. The mass of his hand and arm is 1.00 kg. (b) Estimate the shear stress, assuming this force is exerted on a 1.00-cm-thick pine board that is 10.0 cm wide, (c) If the maximum shear stress a pine board can support before breaking is 3.60 106 N/m2, will the board break?arrow_forward
- Bruce Lee was famous for breaking concrete blocks with a single karate chop. From slow-motion video, the speed of his 1.50-kg hand descending on a block was estimated to be 15.0 m/s, which decreased to a speed of 0.500 m/s in the 2.50 103 s during which his hand made contact with and broke through the block. The maximum shear stress a concrete block can be subjected to before breaking is 9.50 105 N/m2. a. What was the force exerted by Lees hand on the block? b. If a typical concrete block broken by Lee was 3.00 cm thick and 15.2 cm wide, what is the shear stress experienced by the concrete block? c. Will the concrete block succumb to Lees karate chop?arrow_forwardA HOMEWRK-1: The average cross-sectional area of leg 3 cm² and all of body weight 700 N supported of this leg, and the amount of shorting (AL) = 0.15 mm find the length of this leg in meter if you know that young's modulus of the bone is 1.8 * 10¹0 N/m². ANSWER L = 1.157 m L? A--3X1=4 F-100 16 4 - 1881-arrow_forward4. (5 pts.) A rock climber with a mass of 82.6 kg bought a rope with a length of 45.0 m and a diameter of 1.5 cm. Determine the Young modulus of the rope if the rope is stretched by 7.5 cm when the climber hangs from the rope.arrow_forward
- A wall climber of mass 85 kg dangles at the end of a rope. The rope has a diameter of 9.6 mm, and is initially 21 m long but has stretched by 3.2 cm. Calculate the rope’s: a) strain. b) stress. c) Young’s modulus.arrow_forwardFor safety in climbing, a mountaineer uses a nylon rope that is 65 m long and 1.4 cm in diameter. When supporting a(n) 80-kg climber, the rope elongates 1.9 m. Find its Young's modulus X Your response differs significantly from the correct answer Rework your solution from the beginning and check each step carefully. Pa Need Help? Food Submit Answerarrow_forward14) An object put on a table with four legs. Both the table and the object together have the same mass of 15 Kg . If the radius of the table's leg was 1 cm. Find the pressure put on each leg A) 11.95 *10ʻ N/ m² B) 191.1 *10 N/m? c) 23.9 *10° N/ m² D) 47.7 *10ʻ N / m²arrow_forward
- 7 6. A column of height 1m has to support a bronze statue of mass 200 kg. The column breaks if stressed beyond 8 × 105 Pa. a) If the column has a diameter of 30 cm, will it be strong enough to support the statue? Show your calculation. b) If the Young Modulus of the material of the column is 5 x 109 Pa, determine the compression of the column when supporting the statue.arrow_forward2). In a zoo, a Metal-A cable with initial length of 4 meters and initial diameter 1 cm is needed to lift up an injured elephant with mass in 1350 kg. For safety purpose, safety factor of 4 is used and the Metal-A diameter elongated to be 4.013 meters when carry the elephant. The Metal-A wire is remains elastic deformation after putting down the elephant. i) Calculate the engineering stress that exerted on the Metal-A cable. ii) Determine the percentage of elongation, and engineering strain on x, y and z-axis directions of the cable due to the tensile load. iii) Determine the final diameter, and percentage of reduction of area of the Metal-A cable under the applied tensile force. iv) If the zoo keeper selects a cable size with diameter of 5 mm. Is this cable safe to be applied in this task?arrow_forwardAssume a human leg contains a 50cm long bone with an average cross section of 3cm2. By how much (in micrometres) does the bone shorten when the entire body weight of the person is supported by that one leg. The body weight is 700N and the Young's modulus for bone is 1.8 x 100 Paarrow_forward
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