What is the formula of a compound formed from the ions M3+ and X1-?
a. M3X
b. MX
c. M2X3
d. MX3
d
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What is the Hubble constant essentially a measure of?
a. The number of galaxies in the universe. b. The expansion of the universe. c. The age of the Milky Way galaxy. d. The amount of dark matter in an average galaxy.
The number of sunspot cycles in a solar magnetic cycle is ___________
Fill in the blank(s) with correct word
Interplanetary radio station KLGM broadcasts at a frequency of 101 MHz. If you are in a high speed rocket heading straight toward the station, where should you tune your radio to get the best reception of station KLGM? (Hint: Consider the Doppler effect and remember the relationship between wavelength and frequency.)
a) exactly 101 megahertz b) less than 101 megahertz c) greater than 101 megahertz
According to Hubble's Law, the larger a galaxy's redshift, the greater its ________
Fill in the blank(s) with correct word