The element chlorine has two naturally occurring isotopes. about 75% of chlorine isotopes are cl35 and about 25% are cl37. what is the average atomic mass of chlorine atoms?
a. 35.45 amu
b. 36.45 amu
c. 37.45 amu
d. 38.45 amu

Asatellite component is in the shape of a cube with 10cm edges, has an evenly distributed mass of 2 kg and one bolt hole at each of four corners. if the maximum predicted random vibration environment is 10 grms, what bolt size would be a good choice for restraint? what other factors might drive bolt size besides force/stress?