Agirl on a sled coasts down a hill. her speed is 6.5 m/s when she reaches level ground at the bottom. the coefficient of kinetic friction between the sled's runners and the hard, icy snow is 0.045, and the girl and sled together weigh 650 n. how far does the sled travel on the level ground before coming to rest?

The two naturally occurring isotopes of chlorine are 35cl (34.969 amu, 75.77%) and 37cl (36.966 amu, 24.23%). the two naturally occurring isotopes of bromine are 79br (78.918 rm amu, 50.69%) and 81br (80.916 amu, 49.31%). chlorine and bromine combine to form bromine monochloride, brcl. 1. how many peaks will be present in a mass spectrum for brcl? the four combinations of molecule possible given these four isotopes are: 81br37cl, 81br35cl, 79br37cl, and 79br35cl. 2. what are the masses of the four different brcl molecules? express the masses using six significant figures, in decreasing numeric order (highest to lowest), separated by commas.