The pressure in a section of horizontal pipe with a diameter of 2.5 cm is 139 kpa. water ï¬ows through the pipe at 2.9 l/s. if the pressure at a certain point is to be reduced to 101 kpa by constricting a section of the pipe, what should be the diameter of the constricted section? the acceleration of gravity is 9.81 m/s2 . assume laminar nonviscous ï¬ow.

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.

Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack