Hey Andrea==There could be dozens of things to cause it. If it runs bad on wet days spray the dist cap inside and out and all of the plug wires with WD40. GoodluckJoe
Both might be ok, informally, with different meaning. Unsmooth would be a verb, meaning to roughen, as a surface: I unsmoothed it with scratchy, rough sand-paper. Non-smooth would be an adjective: Stand on the non-smooth part for better traction. But it is better to use roughen for the verb and rough for the adjective.
If the surface is completely reflective then the angle at which the incident light leaves the surface will be different. For a rough surface the light would be scattered, whereas for a smooth surface they would reflect at the same angle the hit. If the surface isn't completely reflective then the angle and speed and which the light enters the object. For a rough surface the angles will random and based on the refractive index of the material. For a smooth surface they will be proportional to the sin of the angle times the refractive index.
this means that the parents are rryy and RRYY (R-rough, r-smooth, Y-yellow, y-white skin) the F1 population would all be rough hair and cream coloured skin - phenotype while the genotype would be RrYy. since Rr is dominant therefore rough and since Yy is codominant therefore cream coloured skin now if u self them u get 4 different types of gametes: RY, Ry, rY, ry now putting them in a mendalian double hybrid cross u get the genotypes RRYY-1- rough hair yellow skin RRYy- 2 - rough hair cream skin RrYY-2 - rough hair yellow skin RrYy-4 - rough hair cream skin RRyy-1 - rough hair white skin Rryy-2 - rough hair white skin rrYY-1 - smooth hair yellow skin rrYy-2 - smooth hair cream skin rryy-1 - smooth hair and white skin there fore your phenotypic ratios would be rough hair and yellow skin - 3 rough hair and cream skin - 6 rough hair and white skin - 3 smooth hair and yellow skin - 1 smooth hair and cream skin - 2 smooth hair and white skin - 1
u can make many things as u said a simple one i would suggest u to make a model relating to friction things needed: a toy car , a smooth surface, a rough surface procedure: take a car and push it on the smooth surface mark the place it reached now do the same for the rough surface . observation: u would observe dat the smooth surface is having less friction than the rough one
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