(Brainliest is included in this question) Which statement correctly describes the nucleus of the atom

A. The nucleus of the atom contains the electrons

B. The nucleus of the atom is mostly empty space.

C. The nucleus of the atom surrounds the center of the atom.

D. The nucleus of the atom contains most of the mass of an atom.

Brainliest to the first reasonable answer! Thank you so much!

If you let go of the notebook after lifting it, will it move? how?

Define the terms moral development and moral reasoning

Asteel tube (k=50 w/mk) of inner and outer diameter di = 20mm and do=26mm, respectively, is used to transfer heat from hot gases flowing over the tube (h-hot = 200w/m2k) to cold water flowing through the tube (h-cold = 8000 w/m2k). what is the cold-side overall heat transfer coefficient uc? to enhance heat transfer 16 straight fins of rectangular profile are installed longitudinally along the outer surface of the tube. the fins are equally spaced around the circumference of the tube, each having a thickness of 2mm and a length of 15mm. what is the corresponding overall heat transfer coefficient uc? *solve for uc in both cases*