The operators for the total angular momentum and its three projections are ĵ and ſx , îy, ,, respectively. the commutator between two operators a and ể is [a, b] = âb - bâ. which of the following is true? (a) [j? , z]=0 () [,] = ini, (c) (1, ] = 0 (d) [1,1,] = ini, (e) [3, + i), j) = 0

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

Which statements describe the movement of ocean currents around the globe? check all that apply. strong winds force warm water to sink to the ocean floor. the coriolis effect causes warm and cold water to mix. cool dense water sinks to the ocean floor. warm water replaces cool surface water. wind blowing parallel to the shore causes upwelling of cool water.

Which of the following is an example of motion in two dimensions?