The energy emitted by the Sun comes from chemical reactions
a. True
b. False
Indicate whether the statement is true or false
False
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Induced emf in a straight segment of wire that passes through a magnetic field depends on all of the following, except:
A. the orientation of the wire with respect to the magnetic field direction B. its length, its resistance C. its speed D. the magnetic field strength
An electron moves with a speed of 5.0 × 104 m/s perpendicular to a uniform magnetic field of magnitude 0.20 T. What is the magnitude of the magnetic force on the electron? (e = 1.60 × 10-19 C)
A) 2.6 × 10-24 N B) 5 × 10-20 N C) 4.4 × 10-14 N D) 1.6 × 10-15 N E) zero
Radiation: By what primary heat transfer mechanism does the sun warm the earth?
A. convection B. conduction C. radiation D. All of these processes are equally important in combination.
Most galaxies are members of some sort of cluster of galaxies
Indicate whether the statement is true or false