An engineer tests a strip of metal by applying a pulling force to the metal and measuring the change in length of the metal. Which relationship between stress and strain could she determine for this piece of metal?
1.Young's modulus
2.shear modulus
3.bulk modulus
4.none of these
1
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Once a protoplanet approached a mass of 15 Earth masses or so, it could begin to grow by gravitational collapse
Indicate whether the statement is true or false
Impulse: Calculate the impulse due to a force of 4.5 N that lasts for 1.4 s.
A. 6.3 kg? m/s B. 5.0 kg? m/s C. 5.7 kg? m/s D. 6.9 kg? m/s
The types of radiation from nuclei were originally named alpha, beta, and gamma rays. In order of increasing ability to penetrate matter, these are
A. alpha, beta, gamma. B. beta, gamma, alpha. C. gamma, alpha, beta. D. alpha, gamma, beta. E. gamma, beta, alpha.
Two light sources individually provide intensity Io at a point. If the sources are operated at the same time and are coherent but out of phase 30°, what is the intensity at that point?
A) 3.7 Io B) 2.0 Io C) 3.0 Io D) 2.8 Io E) 1.0 Io