You are presented with several wires made of the same conducting material. The radius and drift speed are given for each wire in terms of some unknown units \rm r and \rm v. Rank the wires in order of decreasing electron current.

Rank from most to least electron current.

a) radius=3r, drift speed=1v

b) radius=4r, drift speed=0.5v

c) radius=1r, drift speed=5v

d) radius=2r, drift speed=2.5v

Frost wedging occurs when water seeps into a crack in a rock, freezes, and causes the crack in the rock to widen. t or f

How many hydrogen (h) atoms are in one molecule of sulfuric acid, h2so4? (1 points) 1 2 4 7

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.