For the titanium with a 2 % pre-strain in Figure 7.9, what grain size would result in a yield stress of 1000 MPa? You can use the results of Example Problem 7.2 to determine your answer.
What will be an ideal response?
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A device that makes use of a bimetallic strip is a
a. thermometer b. thermostat c. choke control in an old automobile d. all of the above e. none of the above
The NASA orbiter that ultimately landed on the surface of the asteroid Eros was:
A) New Horizons. B) Giotto. C) Stardust. D) NEAR Shoemaker. E) Clementine.
Transformers: An ideal transformer steps down 120 V to 12. V and the 2630.-turn secondary supplies 12. A.(a) Determine the current in the primary.(b) Determine the turns ratio.(c) What is the ratio of output power to input power?
What will be an ideal response?
Suppose you measure the brightness and period of a number of Cepheid variable stars in Galaxy A and Galaxy B. You ?nd that all the Cepheid variables in Galaxy A are approximately 25 times as bright (apparent brightness) as Cepheid variables with similar periods in Galaxy B. What can you conclude about the distances of these galaxies?
A) Galaxy A is 25 times as far away as Galaxy B. B) Galaxy A is 5 times as far away as Galaxy B. C) Galaxy B is 25 times as far away as Galaxy A. D) Galaxy B is 5 times as far away as Galaxy A.