mr. jones is a geographical scientist. he researches the rise in carbon dioxide level due to increasing population. in 2003, the average carbon dioxide level was about 223billion metric tons, and in 2008, it was about 1,350 billion metric tons. Between 2003 and 2008 me jones found the rise to be approximately

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.

Panel bc in fig. p2.76 is semi-circular, with the 3 meter radius and horizontal straight edge through point b. compute (a) the hydrostatic force of the water on the panel, (b) its center of pressure, and (c) the moment of this force about point b. assume atmospheric pressure on the dry side of the panel