Why did the Mars Climate Orbiter crash?

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

In a copper wire, a temperature increase is the result of which of the following

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp