4. If 15 cans of weigh? 5. Hooke's law states that stress is directly propor- tional to strain within the elastic limit of a material. 13. Evalu When for brass the stress is 21 MPa, the strain is 250 x 10°. Determine the stress when the strain is 350 x 10-6 (3) cm find the number of mil- (a)​