8. a base has a ph level of
a. between 0 and 7
b. exactly 7
c. between 7 and 14
d. between 0 and 14

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer