Question

A mechanical engineering student wishes to determine the internal pressure existing in a diet soda can. She proceeds by carefully mounting a single-element strain gage aligned in circumferential direction on the center of the soda can, as shown in Fig. 12.22 (below). After wiring the gage properly to a commercial strain indicator, she "pops" the flip-top lid, which relieves the internal pressure. She notes that the strain indicator reads -400E-6. If the can body is made of aluminum (E=$10^6$ psi) with a thickness of 0.010 in and a diameter of 2.25 in, what was the original pressure of the sealed can? Enter your answer in psi (e.g 120.1) QUESTION 6 Another student also performed the experiment described in the problem above. Unfortunately, he did not have access to the commercial strain indicator, and instead he had to construct his own Wheatstone Bridge circuit. His strain gage had an initial resistance of 120 Ohm and a gage factor of 2.05. He used the single gage as one leg of the bridge, which he powered with a 6-V battery. The bridge output was fed to an amplifier (gain = 1000), and the amp's output was read by a voltmeter. The student balanced the bridge circuit before he opened the can. After the can was opened, the voltmeter indicated a voltage of -1.57 V. What was the measured pressure for his can? Enter your answer in psi (e.g 120.1)

          A mechanical engineering student wishes to determine the internal pressure existing in a diet soda can. She proceeds by carefully mounting a single-element strain gage aligned in circumferential direction on the center of the soda can, as shown in Fig. 12.22 (below). After wiring the gage properly to a commercial strain indicator, she "pops" the flip-top lid, which relieves the internal pressure. She notes that the strain indicator reads -400E-6. If the can body is made of aluminum (E=$10^6$ psi) with a thickness of 0.010 in and a diameter of 2.25 in, what was the original pressure of the sealed can? Enter your answer in psi (e.g 120.1)

QUESTION 6
Another student also performed the experiment described in the problem above. Unfortunately, he did not have access to the commercial strain indicator, and instead he had to construct his own Wheatstone Bridge circuit. His strain gage had an initial resistance of 120 Ohm and a gage factor of 2.05. He used the single gage as one leg of the bridge, which he powered with a 6-V battery. The bridge output was fed to an amplifier (gain = 1000), and the amp's output was read by a voltmeter. The student balanced the bridge circuit before he opened the can. After the can was opened, the voltmeter indicated a voltage of -1.57 V. What was the measured pressure for his can? Enter your answer in psi (e.g 120.1)

A mechanical engineering student wishes to determine the internal pressure existing in a diet soda can. She proceeds by carefully mounting a single-element strain gage aligned in circumferential direction on the center of the soda can, as shown in Fig. 12.22 (below). After wiring the gage properly to a commercial strain indicator, she "pops" the flip-top lid, which relieves the internal pressure. She notes that the strain indicator reads -400E-6. If the can body is made of aluminum (E=10^6 psi) with a thickness of 0.010 in and a diameter of 2.25 in, what was the original pressure of the sealed can? Enter your answer in psi (e.g 120.1)

QUESTION 6
Another student also performed the experiment described in the problem above. Unfortunately, he did not have access to the commercial strain indicator, and instead he had to construct his own Wheatstone Bridge circuit. His strain gage had an initial resistance of 120 Ohm and a gage factor of 2.05. He used the single gage as one leg of the bridge, which he powered with a 6-V battery. The bridge output was fed to an amplifier (gain = 1000), and the amp's output was read by a voltmeter. The student balanced the bridge circuit before he opened the can. After the can was opened, the voltmeter indicated a voltage of -1.57 V. What was the measured pressure for his can? Enter your answer in psi (e.g 120.1)

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