Mars has an average atmospheric pressure of 0.007 would it be easier or harder to drink from a straw on mars than on earth explain

Which property of fossils allow scientists to determine the relative rock ages..

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?