A spring has a natural length of 10 cm. It takes 9 J to stretch the spring to 17 cm. How much work would it take to stretch the spring from 17 cm to 24 cm

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue

the tires are rotating at 0.434 rpmlinear speed=45 m/sdiameter=0.550 mradius=0.275 mnow v= rωω= v/rω=45/0.275ω=163.6 rad/sω=163.6 rad/s (1rev/2π rad) (60s/1m)ω=1563 rpm