Hubble's galaxy classification diagram (the "tuning fork")
A) shows how galaxies evolve from one form to another.
B) relates galaxies according to their colors and luminosities.
C) suggests the existence of black holes.
D) relates galaxies according to their shapes.
D) relates galaxies according to their shapes.
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The special theory of relativity predicts that there is an upper limit to the speed of a particle. It therefore follows that there is also an upper limit on the following properties of a particle
A) the kinetic energy B) the total energy C) the linear momentum D) more than one of these E) none of these
The positively charged particle inside an atom is the nucleus
Indicate whether the statement is true or false
Infrared radiation emitted by Earth’s surface
a. heats the troposphere from below. b. causes convection. c. causes weather (storms). d. all of the above. e. none of the above.
Why is the impact theory now preferred as an explanation for the Moon's origin?
What will be an ideal response?