1)the gradual change in the length of your shadow over the course of the day is caused 2)which of the following occurs when the sun is directly above earth’s equator? 3)in the northern hemisphere, the longest day occurs on the

Well the magnitude of its acceleration related to that car starts with the oil change like when you have to change the oil in your car you have to make sure that your precious car is starting really propley and very well

Pe = 1/2k(x)^2  and .05n/m = .05x10^-9m = x 

Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other

This question is incomplete and not physics but i'm  willing to if you can give a better question