Friction friction and wear in so-called self-lubricating materials. Fluid friction occurs between fluid layers that are moving relative to each other. This internal resistance to flow is named "viscosity". In everyday terms, the viscosity of a fluid is described as its "thickness". Thus, water is "thin", having a lower viscosity, while honey is "thick", having a higher viscosity. The less viscous the fluid, the greater its ease of deformation or movement. All real fluids (except superfluids) offer some resistance to shearing and therefore are viscous. For teaching and explanatory purposes it is helpful to use the concept of an inviscid fluid
Ability to benefit a Federal Family Education Loan via ATB prior to 2012 can apply to have the loan forgiven or discharged if they can demonstrate that their school falsely certified their ability to benefit from its training. Ability to benefit Ability to benefit (ATB) is a term used in the context of post-secondary education in the United States to refer to students who have sufficient competency to benefit from post-secondary education but do not have a high school diploma or the Certificate of High School Equivalency. ATB, as assessed by government-approved tests, is required for receiving financial aid by most US public