To protect their young in the nest, peregrine falcons will fly into birds of prey (such as ravens) at high speed. In one such episode, a 610 g falcon flying at 20.0 m/s hit a 1.60 kg raven flying at 9.0 m/s . The falcon hit the raven at right angles to its original path and bounced back at 5.0 m/s . Part A) By what angle did the falcon change the raven's direction of motion?Part B) What was the raven's speed right after the collision?

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 -

Answertemperature and gravity

Third choice "the amount of time it takes for half of a radioactive substancec to decay"