Phobos and Deimos are believed to be captured ____
a. comets
b. planetesimals
c. planetoids
d. asteroids
e. meteorites
d
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Using Wien's law, you can measure the ____ of a distant object without having to travel to it
a. binding energy b. temperature c. radial motion d. energy output e. atomic composition
The ratio of the energy of a photon to its frequency is
A) ?. B) Planck's constant. C) photon speed. D) photon wavelength. E) unknown.
The cloud root name meaning "heap" is ______________
Fill in the blank(s) with correct word
If a proton inside the nucleus of an atom suddenly turned into a neutron, while the atom retained its original number of electrons, what properties of the atom would change?
A) only its atomic number B) only its atomic mass number C) only its electrical charge D) both its atomic number and atomic mass number, but not its electrical charge E) both its atomic number and electrical charge, but not its atomic mass number