9 Consider a thermal neutron incident on a slab-shaped shield of concrete 1 m in thickness, and determine the probability that: (a) the neutron will pass through the shield without a collision, (b) it will ultimately diffuse through the shield, and (c) it will be reflected back from the shield. (For convenience, treat the concrete as if it had the composition of 10% H2O, 50% calcium, and 40% silicon.)

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.