The energy emitted by the Sun comes from chemical reactions

a. True
b. False
Indicate whether the statement is true or false


False

Physics & Space Science

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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

Physics & Space Science

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

Physics & Space Science

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.

Physics & Space Science

Most galaxies are members of some sort of cluster of galaxies

Indicate whether the statement is true or false

Physics & Space Science