The ____ depend(s) on the assumption that the mass of a galaxy or galactic cluster is large enough to keep moving matter bound to the main structure
a. rotation curve method
b. velocity dispersion and cluster methods
c. Shapley-Curtis and Hubble methods
d. recessional velocity method
e. tangential velocity method
b
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The triple alpha process requires higher temperatures to start and produces less energy for a given mass than the proton-proton chain.
Answer the following statement true (T) or false (F)
If the average intensity of the sunlight in Miami, Florida, is 1040 W/m2,
what is the average value of the radiation pressure due to this sunlight on a black totally absorbing asphalt surface in Miami? (c = 3.00 × 108 m/s) A) 2.28 × 10-6 N/m2 B) 9.78 × 10-6 N/m2 C) 7.83 × 10-6 N D) 1.63 × 10-6 N/m2 E) 3.47 × 10-6 N/m2
How long after the Big Bang was the Planck time, before which our current theories are completely unable to describe conditions in the universe?
A) 10-10 second B) 10-35 second C) 10-43 second D) 3 minutes E) 300,000 years
For a capacitor in and ac circuit, how much energy is stored in the capacitor at the instant when current is zero?
A. 0.707 maximum B. half C. zero D. maximum