Which is not an observation?
a. the mouse is eating.
b. the mouse is hungry.
c. the mouse has grown 2 cm.
d. the mouse has consumed 15 ml of water.

Agas has a volume of 0.7 l at 300 mmhg. what would be the new volume at 900 mmhg

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg