Use equation (2.190) to show that the razor-thin disk for which the circular speed is given by (2.262a) has surface density (toomre 1963) 1 σ(r ) (2.262b) v1 a2/r2 2tgr show that these formulae correspond to the mestel disk in an appropriate limit. show that the surface density (2.68b) of the kuzmin disk is obtained when £(r) is differentiated with respect to a2, and hence recover the circular speed of this model

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.