A proton is fired from far away toward the nucleus of a mercuryatom. Mercury is element number 80, and the diameter of the nucleusis 14.0 fm. If the proton is fired at a speed of 4.0 \times 10^{7}\;{\rm m}/{\rm s},what is its closest approach to the surface of the nucleus?

a) Assume the nucleus remains at rest.
The unit is (fm)

this could be newton#'s law of cooling. the cooling curve is exponential

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)