Question $9$

One basic theary of metal working is that of "modulus of elasticity". So if the stress is $450,000$ Ibs on a part and the strain is $\mathrm{.}015$ inches per inch, what is modulus of elasticity?

$30{10}^6$

$20{10}^6$

$40{10}^6$

$10{10}^6$

Question $10$

Buffing wheels are manufactured from disks $($either whole or pieced$)$ of bleached or unbleached cotton or woolen cloth, and they are used as the agent for carrying abrasive powders, such as tripoli, crocus, rouge, lime$,$ etc., which are mixed with waxes or greases as a bond. True or False