The rotation curve of a galaxy can be used to determine
a. the relative number of hot young stars in the galaxy.
b. the relative amount of gas and dust in the galaxy.
c. the radius of the galaxy.
d. the luminosity of the galaxy.
e. the mass of the galaxy.
e
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You live at a latitude of 73° N. What is the angle between the northern horizon and the north celestial pole?
a. 73° b. 27° c. 17° d. 23 ° e. 5°
Collectively, electrons, muons, and neutrinos are called:
A) hadrons. B) baryons. C) photons. D) leptons. E) pions.
You drive 6.00 km at 50.0 km/h and then another 6.00 km at 90.0 km/h. Your average speed over the 12.0 km drive will be
A) greater than 70.0 km/h. B) equal to 70.0 km/h. C) less than 70.0 km/h. D) exactly 38.0 km/h. E) cannot be determined from the information given, must also know directions traveled
What is the evidence that a meteorite impact caused the great extinction at the end of the Mesozoic?
What will be an ideal response?