(4) A tread depth of less than 2/32 of an inch measured in any two major tread grooves at three locations equally spaced around the circumference of the tire, or for those tires with tread wear indicators, a tire shall be considered unsafe if it is worn to the point that the tread wear indicators contact the road in any two major tread grooves at ...
The strength of chemical bonds varies considerably; there are strong bonds such as covalent or ionic bonds and weak bonds such as Dipole-dipole interaction, the London dispersion force and hydrogen bonding. strong chemical bond is formed from the transfer or sharing of electrons between atomic centers and relies on the electrostatic attraction between the protons in nuclei and the electrons in the orbitals. The types of strong bond differ due to the difference in electronegativity of the constituent elements.
IONIC BOND. The ionic bond is the electrostatic force of attraction between two oppositely charged ions i.e., a positively charged cation and a negatively charged anion. It is formed due to complete transfer of electrons from one atom to another atom. The steps involved in the formation of ionic bond can be summarized as: 1  a) An electropositive atom (metal) loses electron(s) to form a positively charged ion called as cation. 2  b) An electronegative atom accepts the electron(s) to form a negatively charged ion, otherwise known as anion.