Is energy absorbed or given off when an electron and a hole of a semi-conductor crystal recombine? What are the forms of energy that can be absorbed or given off?

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

In what direction does the medium move relative to the direction of the wave? explain.

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx hurrim timed