Some bacteria are propelled by motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.4×10(-8)m, and a tangential speed at the
a) 6.60×10(-4) m/s
b) 9.80×10(-4) m/s
c) 1.20×10(-3) m/s
d) 1.45×10(-3) m/s