- Explain the role friction has in the energy transformation of a person skiing downhill?

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Given f(x)=x+2k/3x-2, find the value of k if f^-1(1)=3
Help meee? Can Mucus be produced voluntary by some animals. Or wax voluntary in their ears anytime they want in any quantity.? Calculate stress and strain in round bar 12mm in diameter and 150mm long with tensile force of 400N acting on it? How do i confirmed the identity of a person saw over the internet? If an object with a mass of 35 grams has a volume of 70cm cubed and its length is 40cm, what is the density of the object?