Acrystallographer measures the horizontal spacing between molecules in a crystal. the spacing is 15.22 nm . what is the total width of a crystal in millimeters 105 molecules across? write your answer as a decimal.

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds