The coefficient of linear expansion of ordinary glass is three times that of Pyrex glass. An ordinary glass rod and a Pyrex glass rod of equal lengths at room temperature are dropped into boiling water. The change in length of the ordinary glass rod will be 3 times the change in length of the Pyrex glass rod
Indicate whether the statement is true or false
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A steel plane truss is loaded at B and C by forces P 5 200 kN. The cross-sectional area of each member is A 5 3970 mm2. Truss dimensions are H 5 3 m and L 5 4 m. The maximum shear stress in bar AB is approx- imately:
(A) 27 MPa
(B) 33 MPa
(C) 50 MPa
(D) 69 MPa
Only neutrinos can go faster than the speed of light
Indicate whether the statement is true or false
In order for two objects to have the same temperature, they must
A. be in thermal equilibrium. B. be in thermal contact with each other. C. have the same relative "hotness" or "coldness" when touched. D. have all of the properties listed above. E. have only properties (b) and (c) above.
The process of converting a sequence of nucleotides in a section of DNA to a sequence of nucleotides in RNA, as a precursor to protein synthesis is called
A) encryption B) translation C) deciphering D) transcription