Based on observations of the universal expansion, the age of the universe is about
A) 14,000 years.
B) 14 million years.
C) 14 billion years.
D) 14 trillion years.
C
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Which element is critical to the formation of the volcanic surface of Io?
A) silicon B) sulfur C) phosphorus D) iron E) carbon
A box is launched up a frictionless incline with an angle of elevation ?. The maximum height reached by the box is h. The box is again launched up the incline with the same initial speed it had before, but this time the angle of elevation has been increased to ?. How does the maximum height H reached this time by the box compare with the previous value h?
a. H = h b. H > h c. H < h d. H = ((sin?)/(sin?))
Determine the viscosity and the kinematic viscosity of water at 300 K and 350 K.
What will be an ideal response?
A neutron star is
A) the remains of a star that died by expelling its outer layers in a planetary nebula. B) a star made mostly of elements with high atomic mass numbers, so that they have lots of neutrons. C) the remains of a star that died in a massive star supernova (if no black hole was created). D) an object that will ultimately become a black hole.