Asample of chlorine has two naturally occurring isotopes. the isotope cl-35 (mass 35.0 amu) makes up 75.8% of the sample, and the isotope cl-37 (mass = 37.0 amu) makes up 24.3% of the sample. what is the average atomic mass for chlorine?

Acube has a volume of 2011 cubic inches. what is the angle measure between a side of a cube and its interior diagonal?

Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?

Which of these best describes the term ecliptic? a. the circle where "earth meets the sky" b. the change in azimuth and altitude of an object c. the point directly above the geographic north pole d. the path of the sun through the constellations of the zodiac