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What is the typical values of coefficient of friction of soil on plastic pipes?
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∙ 11y ago
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∙ 11y ago
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Values of static and dynamic coefficient of friction for concrete to soil?
0.45
Is friction independent of the area of contact?
Generally no. The friction force is typically assumed independent of surface area, and proportional to the force between the two objects. By changing the contact area, you are changing how that force is concentrated. i.e. a small surface area means that your force is distributed across a small region, creating a high pressure (force/area) at the contact. By increasing the surface area, you distrubte that force and lower the pressure. This is, however, an idealization and can break down in some instances.
Carbon monoxide burns readily in oxygen forming carbon dioxide what coefficient values?
1.22
How and why did Rf values differ for each solvent system?
Due to the difference in relative affinity or partition coefficient differences between the sample and the stationary phase/mobile phase
What is the color of phenolphthalein in solutions with pH values ranging from 2 to 6?
A typical aqueous solution containing phenolpthalein is colorless within the pH range 2 - 6.
Values of static and dynamic coefficient of friction for concrete to soil?
0.45
Why the coefficient of friction cannot be zero?
The coefficient of friction is an empirical measurement and has to be measured experimentally, and cannot be found through calculations. Rougher surfaces tend to have higher effective values. Most dry materials in combination have friction coefficient values between 0.3 and 0.6. Values outside this range are rarer, but Teflon, for example, can have a coefficient as low as 0.04. Therefore, a value of zero would mean no friction at all, an ELUSIVE property even magnetic levitation vehicles have drag.
How are the values of coefficient of static and kinetic friction affected by the area of contact?
negative charge.....Reduction of atom reducing the nucleus stratus.
Give an example of friction?
Case 2: A truck is travelling at a constant speed up a hill with a normal force of 1360N. The Force of the Kinetic friction acting on the truck is 266N. What is the coefficient of kinetic friction between the truck and the road? N = 1360N, Fk = 266N Step 1: Substitute the values in the below Kinetic Friction Coefficient formula: This example will guide you to calculate the Kinetic Friction Coefficient manually.
How do you determine coefficient of determination in excel?
= CORREL(x values,y values) ***clarification**** CORREL gives you the correlation coefficient (r), which is different than the coefficient of determination (R2) outside of simple linear regression situations.
Is it possible to calculate the coefficient of variation using relative values instead of absolute values?
The coefficient of variation should be computed only for data measured on a ratio scale, as the coefficient of variation may not have any meaning for data on an interval scale. Using relative values instead of absolute values can cause the formula to give an incorrect answer.
What is friction what causes it and wahat does it do?
Friction is a force that acts on all touching objects. Friction is caused by the roughness of on object. Even if an object feels smooth to the touch, it will never be perfectly smooth because there will always be microscopically small peaks and valleys at the atomic level. What friction does is essentially try to prevent an object from moving or continue moving. There are two types of friction, static and kinetic. Static friction must be overcome to get something moving, kinetic friction must be overcome to keep something moving. They both have values that depend on the two surfaces touching and are referred to as the coefficient of their respective term. Note: the coefficient of static friction is always higher than that of kinetic for the same two materials.
What is the possible range of values for the coefficient of variation?
0% to 100%
What pattern do you notice about the values for the coefficients of friction?
The value of static friction is higher than the value of kinetic (sliding) friction.
Is friction independent of the area of contact?
Generally no. The friction force is typically assumed independent of surface area, and proportional to the force between the two objects. By changing the contact area, you are changing how that force is concentrated. i.e. a small surface area means that your force is distributed across a small region, creating a high pressure (force/area) at the contact. By increasing the surface area, you distrubte that force and lower the pressure. This is, however, an idealization and can break down in some instances.
What is the value that is not typical of most other values in a data set?
The value that is not typical of most other values in a data set is an Outlier.
What are the values of coefficient of correlation between perfectly correlated variables?
1 or -1
