In the viscosity lab, what did you change to test viscosity

A. Friction

B. Gravity

C. Surface area

D. Temperature

D. Temperature

Explanation:

Viscosity can be defined as the measure of a fluid's resistance to flow by determing the fluid strain rate produced by a given applied shear stress. Viscosity occurs in liquid by the advent of cohesive forces between the molecules of liquid and also in collision between molecules of gas.

In a Viscosity lab, Temperature change affects the test of viscosity. This is because an increase in temperature leads to increase in rates of molecules interchanging, thus molecules moves faster with higher temperatures.

The aftermath effect of temperature on viscous liquid is to reduce the cohesive force while simultaneously increasing the rate of molecular interchange. Also, according to the kinetic theory of gases, viscosity is proportional to the square root of the absolute temperature. practically, it increases more rapidly.

D. Temperature

Explanation:

Viscosity is defined as the resistance of molecular layers to adjacent layers in a fluid. It is also defined as the resistance to overall flow of the fluid.

The viscosity of fluids, depends upon the temperature. It increases with decrease in temperature, due to increase in inter-molecular forces and hence, the resistive force, as well. And for the same reason viscosity decrease with increase in temperature.

Thus, we change Temperature to test viscosity, in viscosity lab.