The diagram shows waves of sound travelling through the air.
By which factor is the sound intensity decreased at 3
meters?

Sound
270 db at 1 meter

-1/9
-1/3
-1/2
-1/4

Acatapult is tested by roman legionnaires. they tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): range = 0.4 km; angle of launch = π/5 rad; landing height = launch height. what is the initial velocity of launch of the boulders if air resistance is negligible?

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.

Which is the most accurate name for the ionic compound cas?