A bridge is made with segments of concrete 50 m long. If the linear expansion coefficient is 12 × 10^?6 (°C)?1, how much spacing (in cm) is needed to allow for expansion during an extreme temperature change of 150°F?
a. 10
b. 2.5
c. 7.5
d. 5.0
e. 9.5
d
Physics & Space Science
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Underground mines produce smaller amounts of coal per year than strip mines by their very nature
What will be an ideal response?
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First Law of Thermodynamics: An ideal gas undergoes the process a?b?c?a shown in the pV diagram. In the figure, Pa = Pc = 240 kPa, Vb = Vc = 40 L, Va = 15 L, and Pb = 400 kPa. How much heat is gained by the gas in this a?b?c?a process?
A. 1000 J B. 1500 J C. 2000 J D. 2500 J E. 3000 J
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The most common kinds of stars are low-luminosity stars
Indicate whether the statement is true or false
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