If a typical halo star has an orbital velocity of 250 km⁄s, how long does it take to pass through the disk of the galaxy? Assume that the disk is 1000 pc thick. Assume the halo star passes vertically through the disk. (Note that 1 pc = 3.1 × 1013 km). Express your answer in millions of years.

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by