An airplane flies with a constant speed of 880 km/h. How far can it travel in 2 1/4 hours? It can travel 1980 kilometers in 2 hours.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg