Raindrops make an angle with the vertical when viewed through a moving train
window. if the speedometer on the train is showing that the speed of the
train is v , what is the speed of the raindrops in the reference frame of the earth
in which they are assumed to fall vertically?

Agas is contained in a vertical, frictionless piston–cylinder device. the piston has a mass of 3.2 kg and a cross-sectional area of 35 cm2. a compressed spring above the piston exerts a force of 190 n on the piston. if the atmospheric pressure is 95 kpa, determine the pressure inside the cylinder.

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

Which transition by an electron will release the greatest amount of energy? oa ob oc od