Which of these stars would be the hottest?
A) B0 B) A0 C) M10 D) G2 E) K9
A
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The _____ marks the top of the sky above your head
A) north point B) zenith C) south point D) nadir
Venus is located
A) near the outer boundary of the Sun's habitable zone B) in the middle of the Sun's habitable zone C) near the inner boundary of the Sun's habitable zone D) outside the Sun's habitable zone
Star A has the peak of its blackbody radiation at lA. Star B has its peak at lB, which is one-third that of lA. If Star A's surface temperature is TA, how does the surface temperature TB of Star B compare?
a. TB = TA/9 c. TB = 9 TA b. TB = 3 TA d. TB = TA/3
Young's Modulus: A 50-kg air conditioner is placed on top of a concrete pad that is 20 cm thick and has a cross-sectional area of 3.0 m2. What is the change in thickness of the pad caused by the air conditioner? Young's modulus for concrete is 2.3 × 1010 N/m2.
A. 1.4 × 10-9 m B. 2.8 × 10-9 m C. 1.4 × 10-8 m D. 1.4 × 10-7 m E. 2.8 × 10-8 m