noun, Biology. 1. an orientation of an organism to an external stimulus, as light, especially by growth rather than by movement. Origin of tropism. 1895-1900. First recorded in 1895-1900; independent use of -tropism. Related forms. tropismatic.
Friction on as-grown graphene (Fig. 1c) is ultra-low and rather uniform with its magnitude close to the previous reports4. In contrast, friction on graphene after ï¬uorination becomes
Ways on how to reduce friction A. Ways on how to reduce friction A. 1. using grease or any other lubricant 2. using smoother surfaces 3. using fluids of lower viscosity (measure of resistance to flow) 4.Use rollers, wheels or ball bearings and 5.Objects like cars and planes are modelled with streamlined shapes. B. 1. Friction cannot be eliminated. 2.