Imagine yourself in a universe that is exhibiting a blue shift. This must mean:
it's expanding much faster than our Universe.
it's expanding, but in a jerky fashion.
it's collapsing.
it's in a steady state, neither expanding nor collapsing.
there's no such thing as a blue shift of light waves.
it's collapsing.
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A container is filled with water and the pressure at the container bottom is P. If the container is instead filled with oil having a density of 0.80 that of water, what new bottom pressure results?
a. a pressure < P b. the same pressure P c. a pressure > P d. This is unable to be determined with the information given.
A hypothetical star has a parallax of 0.05 arcseconds. How faraway is it?
a) 50 parsecs b) 10 parsecs c) 5 parsecs d) 0.05 parsecs e) 20 parsecs
Which of the following refer to the basic categories associated with the energy of a single molecule in a gaseous phase?
a. nuclear, electronic, interval b. electronic, translation, rotation, vibration c. ionic, covalent, hydrogen, Van der Waals d. translation, rotation, vibration e. dipole-dipole, covalent, ionic, translation
When an unstable Cd nucleus undergoes gamma decay, the nucleus formed is that of
a. Cadmium. b. Tin. c. Silver. d. Palladium. e. Indium.