nonpolar covalent bond. (physical chemistry). A bond in which a pair of electrons is distributed or shared equally between two atoms. 1  Facebook.2  Twitter.onpolar covalent bond. (physical chemistry). A bond in which a pair of electrons is distributed or shared equally between two atoms. 1  Facebook.
When is a barrel chest a sign of a disease process? Chronic obstructive pulmonary disease (COPD) is the most common instance in which a barrel chest will occur. In these cases, itâs a sign of the lungs being over-expanded. This is caused by the loss of elasticity and results in the person having hyper-inflated lungs.
The fact that most shotgun bores are not cylindrical also causes deviations from the ideal bore diameter. The chamber of the gun is larger, to accommodate the thickness of the shotshell walls, and a forcing cone in front of the chamber reduces the diameter down to the bore diameter.he fact that most shotgun bores are not cylindrical also causes deviations from the ideal bore diameter. The chamber of the gun is larger, to accommodate the thickness of the shotshell walls, and a forcing cone in front of the chamber reduces the diameter down to the bore diameter.