You lay a rectangular board on the horizontal floor and then tilt the board about one edge until it slopes at an angle θ with the horizontal. choose your origin at one of the two corners that touch the floor, the x axis pointing along the bottom edge of the board, the y axis pointing up the slope, and the z axis normal to the board. you now kick a frictionless puck that is resting at the origin so that it slides across the board with initial velocity  v0 = v0x xˆ + v0 y yˆ . write down newton’s second law using the given coordinate system and use it to calculate how far the puck is from the origin when it returns to floor level.

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 -

Yup no bull frogs here man

The answer is  a.first and third quarters 

What are you trying to ask?