If a cast iron has the designation 60-40-18, the yield strength is equal to _________psi.
Fill in the blank(s) with the appropriate word(s).
60,000
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Why is Saturn's moon Titan able to retain an atmosphere?
a. Titan only contains light gases which are easy to retain. b. Titan has a large enough mass and is cold enough. c. Titan is biologically active. d. It is so close to Saturn that Saturn's gravity retains Titan's atmosphere.
For experiments involving the setup shown in figure Q4.1b, which of the following possible results (if seen) regarding the final value displayed by the voltmeter would probably not be consistent with the wave model of light? 
A. It increases as the light’s intensity increases. B. It is independent of the light’s intensity. C. It varies as the light’s wavelength changes. D. It increases as the rate of electron ejection increases.
A device that doesn't obey Ohm's law is a
A) copper wire. B) silver bar. C) light bulb. D) resistor. E) tungsten wire.
The "Great Wall" is the structure in the Large Magellanic Cloud near where Supernova 1987A occurred
Indicate whether the statement is true or false