Comet nuclei can be darker than charcoal
Indicate whether the statement is true or false
TRUE
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The supernova event for a massive star that has lost a large amount of mass to a close binary companion ____
a. does not show hydrogen emission lines in the spectrum of the remnant b. does not produce iron in the core before the explosion c. is less luminous because the companion star absorbs most of the remnant material d. is more likely to produce a neutron star than an isolated supernova e. triggers a supernova in the binary companion
Entropy is a measure of
A) messiness. B) disorder. C) both of the above D) none of the above
A 0.30 kg mass is suspended on a string. In equilibrium the mass stretches the spring 2.0 cm downward. The mass is then pulled an additional distance of 1.0 cm down and released from rest
(a) Write down its equation of motion. (b) Calculate the velocity of the mass at T/3 s.
Ethyl alcohol bubbles form at 78.50C, 101 kPa. Assuming that the surface tension is 75 mN/m and the density of vapor ethyl alcohol is 0.8 kg/m^3 with a vapor pressure of 102 kPa, estimate the buoyant force acting on the bubbles.
What will be an ideal response?