What is the relationship between linear, cubic and area expansivity​

Which of these describe conduction transfer of heat between two objects that are touching transfer of heat by the actual movement of war matter the process in which energy is imitated by one of the object transmitted through space and absorbed by another a process in which energy is released by the molecules breaking apart

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87