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
What It Is to Burn album turned out to be a bit of a disappoinment due to the large amount of hype surrounding the release, giving it an overall 3 stars. "What It Is to Burn" charted at number 99 on the "Billboard" 200 and number 1 on the Heatseekers Albums charts. It also charted at number 177 in the UK. "Letters to You" charted in the UK at number 39. "What It Is to Burn" charted at number 15 on the Alternative Songs chart and number 35 on the Mainstream Rock chart. By April 2003, the album had sold over 200,000 copies in the