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

Taylor's experiment: 1. accurately measured the speed of light 2. locked together the phases of two light sources so that the interference pattern would not shift 3. showed that man's reaction time was much slower than the speed of light 4. showed that individual photons have wave characteristics

Your starship, the aimless wanderer, lands on the mysterious planet mongo. as chief scientist-engineer, you make the following measurements: a 2.50-kg stone thrown upward from the ground at 14.0 m/s returns to the ground in 5.70 s ; the circumference of mongo at the equator is 2.20×10^5 km ; and there is no appreciable atmosphere on mongo. (a) the starship commander, captain confusion, asks for the following information: what is the mass of mongo? (b) if the aimless wanderer goes into a circular orbit 2.20×10^4 km above the surface of mongo, how many hours will it take the ship to complete one orbit? (c) an unmanned spacecraft is in a circular orbit around the moon, observing the lunar surface from an altitude of 44.0 km . to the dismay of scientists on earth, an electrical fault causes an on-board thruster to fire, decreasing the speed of the spacecraft by 23.0 m/s . if nothing is done to correct its orbit, with what speed (in km/h) will the spacecraft crash into the lunar surface?

Can you match these to the correct definition