Acyclist competes in a one-lap race around a flat, circular course of radius 140m. starting from rest and speeding up at a constant rate throughout the race, the cyclist covers the entire course in 60 s. the mass of the bicycle (including the rider) is 76kg. the magnitude of the net force acting on the cyclist at the finish line is 470 n. if you assume air resistance is negligible, and the net force acting on the bicyclist is just the force of static friction, we assume the force of static friction in the above case is 470 n. 470 n is the magnitude of static friction. based on this, what is the minimum coefficient of static friction (mu-s) between the race track and bicycle?

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

To understand the electric potential and electric field of a point charge in three dimensions consider a positive point charge q, located at the origin of three-dimensional space. throughout this problem, use k in place of 14? ? 0. part adue to symmetry, the electric field of a point charge at the origin must point from the origin.answer in one word.part bfind e(r), the magnitude of the electric field at distance r from the point charge q.express your answer in terms of r, k, and q. part cfind v(r), the electric potential at distance rfrom the point charge q.express your answer in terms of r, k, and q part dwhich of the following is the correct relationship between the magnitude of a radial electric field and its associated electric potential ? more than one answer may be correct for the particular case of a point charge at the origin, but you should choose the correct general relationship. a)e(r)=dv(r)drb)e(r)=v(r)rc)e(r)=? dv(r)drd)e(r)=? v(r)r