The solubility parameter of polyethylene is 16.6 (MPa)0.5 and for ethanol it is 26.0 (MPa)0.5. Should ethanol dissolve polyethylene? _____________
Fill in the blank(s) with the appropriate word(s).
No
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Which of the following may explain the failure to observe Population III stars?
A. Population III stars had their surfaces contaminated by remnants of massive stars. B. We do not expect to observe Population III stars, because pure hydrogen and helium stars never formed. C. The first stars to be formed in the young Milky Way are too far away to be detected. D. None of these choices is correct.
Which of the following is not consistent with the major hallmarks of science?
A) A scientific model must make testable predictions. B) Science progresses through the creation and testing of models that explain observation as simply as possible. C) Scientific explanations should be based solely on natural causes. D) Science consists of proven theories that are understood to be true explanations of reality.
Kirchhoff's voltage rule is an example of conservation of energy
Indicate whether the statement is true or false
Charge of uniform density 50 nC/m3 is distributed throughout the inside of a long nonconducting cylindrical rod (radius = 5.0 cm). Determine the magnitude of the potential difference of point A (2.0 cm from the axis of the rod) and point B (4.0 cm from the axis)
a. 2.7 V b. 2.0 V c. 2.4 V d. 1.7 V e. 3.4 V