Two hockey pucks, labeled a and b, are initially at rest on a smooth ice surface and are separated by a distance of 26.0 m . simultaneously, each puck is given a quick push, and they begin to slide directly toward each other. puck a moves with a speed of 2.30 m/s , and puck b moves with a speed of 3.90 m/s .
your answer should satisfy common sense. for instance, can you decide which of the following values for the distance covered by puck a would definitely be wrong, regardless of the speed of the two pucks and considering that the two pucks are sliding toward each other?
(a) 5 m
(b) 33 m
(c) 27 m
(d) 1 m
(e) 21 m

“other instruments such as gravimeters and magnetometers are also used in the search for petroleum. extracting crude oil normally starts with drilling wells into an underground reservoir. when an oil well has been tapped, a geologist (known on the rig as the "mudlogger") will note its presence. “ this is what i found on google i hope it

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -