Based on what you have learned from your rankings in Parts A and B which statement best describes how variation in the Earth-Sun distance affects the seasons?
A. No matter where you live or what the seasons, it is generally hotter when Earth is closer to the Sun and colder when Earth is farther from the Sun.
B. The variation in Earth-Sun distance over the course of each year has virtually no effect on the seasons.
C. Summer occurs when Earth is closer to the Sun and winter occurs when Earth is farther from the Sun
Ans: B. The variation in Earth-Sun distance over the course of each year has virtually no effect on the seasons.
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Polyacetylene conducts electricity if it has bonding defects called _________.
Fill in the blank(s) with the appropriate word(s).
A steel plate weighing 27 kN is hoisted by a cable sling that has a clevis at each end. The pins through the clevises are 22 mm in diameter. Each half of the cable is at an angle of 35° to the vertical. The average shear stress in each pin is approximately:
(A) 22 MPa
(B) 28 MPa
(C) 40 MPa
(D) 48 MPa
In the Bergeron process, condensation occurs on ______________
Fill in the blank(s) with correct word
Which of the following electron transitions is forbidden?
A) 4p ? 1s B) 3s ? 2p C) 3d ? 2p D) 3d ? 1s