What are Type I supernovae used for?
A) standard candles for determining distances to other galaxies
B) age-dating the massive stars in clusters where they blow up
C) explaining the pulsars in supernova remnants
D) calculating the density of the interstellar medium from their remnants
E) determining the half-lives of the heavy elements they create
A
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Suppose that in an examination of a spinal injury it is found that the spinal fluid (with about the same density as water) will rise a vertical height of 13. cm in an open tube
What pressure does this correspond to, expressed in mm of mercury and in atmospheres?
Glass is largely opaque to
A) infrared light. B) visible light. C) ultraviolet light.
N rays do not exist
a. True b. False Indicate whether the statement is true or false
An ideal gas is confined to a container with adjustable volume. The number of moles and temperature are constant. By what factor will the volume change if pressure quadruples?
a. 16 c. 1/4 b. 4 d. 1/16