Which of the following statements about the movement of earth's atmosphere is correct? select one:

a. a column of warm, less dense air produces high pressure at the earth's surface.
b. cold air is less dense than cool air so it tends to sink toward the earth's surface.
c. the movement of air within the atmospheric convection cells generates the wind belts.
d. warm air is denser than cool air so it tends to sink toward the earth's surface.
e. a column of cool, dense air produces low pressure at the earth's surface.

Does baby oil have a high or low velocity?

This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal.find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?

What type of nuclear decay causes the atomic number of an element to increase by 1?