Consider this statement: air is matter. which facts best support the statement?

a. balloons can be filled with air.
b. air is essential for life to exist.
c. air has mass.
d. air is not an element.
e. to float on air is to be happy.
f. air can’t be seen.

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Patricia is trying to compare the average rainfall of new york to that of arizona. a comparison between these two states for the months of july through september would best be measured in