A cobalt atom contains 27 protons, 32 neutrons, and 27 electrons. What is the atomic mass of cobalt?
A. 59 amu
B. 86 amu
C. 32 amu
D. 54 amu

Aman pushes on a trunk with a force of 250 newtons. the trunk does not move. how much positive work is done on the trunk? 0.0 j -250 j 250 j 125 j

Jessie ran 5000 meters from the cops and an average speed of 6 meters / second before he got caught . how long did he run?

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?