Astraight railroad track is being built to connect two cities. the measured distance of the track between the two cities is 160.5 miles. a mailstop is 28.5 miles from the first city. how far is the mailstop from the second city?

The “death throes” of stars are amongst the most complex phenomena in all of astronomy, and the “corpses” of stars amongst the most energetic and exotic objects in existence. beginning at the end of the core helium fusion stage in a star’s life, describe in detail the post-main sequence development of both (a) a 1.0 solar mass star, and (b) a 25.0 solar mass star. in what significant ways do they differ? what role does each of these types of stars play in the "star-gas-star" cycle and the evolution of chemical elements in our galaxy?

In the first law of thermodynamics, triangle e=q-w, what does q stand for

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of