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

Write a question about how changing temperature affects the gas inside the sports ball

The motor m applies a time-varying force of f (200 t) n, where t is in seconds. box b with mass 200 kg starts from rest, and the coefficients of kinetic and static friction are 0.2 and us 0.3 the acceleration due to gravity is g 9.8 m/s2 b 300 a) find the time ' when the box starts to move. b) calculate the speed of the crate at 3 s c) calculate the power delivered by the motor at t 3 s

In a hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. how many unique charge-pairs are there (without double counting)?