Einstein's ________ constant has been revived to help us explain dark energy
Fill in the blank(s) with correct word
cosmological
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The flattest of the elliptical galaxies are class
A) E0. B) SBO. C) E7. D) E9. E) SBF.
The 1 560 kg solid steel door to a bank vault is 2.00 m high, 1.00 m wide and 10 cm thick. One hinge is 60.0 cm down from the top on the left hand side of the door. The other hinge is 30.0 cm up from the bottom. What horizontal force, in what direction, does the door exert on the upper hinge?
a. 6 950 N, left b. 6 950 N, right c. 7 640 N, left d. 7 640 N, right e. 15 300 N, left
What is 34 + ( 3 ) × (1.2465 ) written with the correct number of significant figures?
A) 37.7 B) 37.74 C) 4 × 101 D) 38 E) 37.7395
Two stars, A and B, have the same emissivity, but the radii and surface temperatures are different with RA = 2 RB, and TA = 0.5 TB. Assuming the temperature of space to be negligible, which star radiates the most energy per unit time?
a. Star A b. Star B c. Both radiate the same amount of energy per unit time. d. More information is needed in order to make a determination.