Listed following are several fictitious stars with their luminosities given in terms of the sun's luminosity (lsun) and their distances from earth given in light-years (ly).
rank the stars based on how bright each would appear in the sky as seen from earth, from brightest to dimmest. if two (or more) stars have the same brightness in the sky, write the stars one below the other.
compare the result with the ranking of luminosity from largest to smallest.
a) enzo: 200 lsun , 20 ly
b) ferdinand: 400 lsun , 20 ly
c) nismo: 100 lsun , 8 ly
d) lotus: 400 lsun , 40 ly
e) shelby: 100 lsun , 10 ly

Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.

What is a subatomic particle with a negative charge and very little mass?

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.