The speed v of a sound Waves through a medium May be assumed to depond on (a) the denisty P of the medium and [b] Its modolus of elaticity E which is the ratio of stress to Strain deduce by the method of dimensions, the Formular for the speed of sand

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

Asmall 21 kilogram canoe is floating downriver at a speed of 1 m/s. what is the canoe's kinetic energy?

Aball horizontally thrown from a cliff at 8m/s