Consider two imaginary spherical surfaces of different radius, both centered on a point sound source emitting spherical waves. The power transmitted across the larger sphere is the power transmitted across the smaller and the intensity at a point on the larger sphere is the intensity at a point on the smaller.

5points ! is potential chemical energy always transformed into kinetic

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

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