What are the thermal boundary conditions for polypropylene (PPP) or polyvinyl chloride (PVC) cylinder in Lab 6?a. Constant temperature at the inner surface, b. constant temperature at the outer surfaceConstant temperature at the inner surface, c. zero temperature gradient at the outer surfaceUniform heat flux at the inner surface, d. constant temperature at the outer surfaceUniform heat flux at the inner surface, e. zero temperature gradient at the outer surface

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 -

Answer i believe its center of gravity

For the bullet,  the net force on the bullet: an fbd would look like a dot with a horizontal "friction" force protruding from one end.by newton's 2nd law: we can solve for acceleration since we know  and .we know that  (final velocity is bullet not moving), . we can use the following kinematic equation to get  , or the displacement.so it penetrates  m.

Answer (b) high pressure produced by the clouds