Many gels and colloids are thixotropic materials, exhibiting a stable form at rest but becoming fluid when agitated. Some fluids are anti-thixotropic: constant shear stress for a time causes an increase in viscosity or even solidification. Constant shear stress can be applied by shaking or mixing. Fluids which exhibit this property are usually called rheopectic. They are much less common.
Hereâs a look at what the $19.95 excludes and how it may all add up in a very consumer-unfriendly fashion: Mileage: Rack up 50 miles between pickup and drop-off, and youâre looking at an added mileage cost of $29.50 for the van (at 59 cents a mile) and $44.50 for the truck (at 89 cents a mile). (Theoretically, U-Haul arrived at these specific mileage rates so that it could charge â and advertise â the $19.95 base fee.)
Beginning on January 1, 2016, the standard mileage rates for the use of a car (also vans, pickups or panel trucks) will be: 54 cents per mile for business miles driven (57.5 cents in 2015) 19 cents per mile driven for medical or moving purposes (23 cents in 2015)