[填空题]
A coin is placed 11.0 cm ftn7,f i uwza-n 1c3zh/oxxqkh((w( v7rom the axis of a rotating tu3e)eip :r0vbb7 6ftqwrntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 36 rpm is reached and the coin slides off. What is the coefficient of static fb7i) btwv3 ep0q f:6erriction between the coin and the turntable?
