64
Materials that can be stretched and still return to their original forms when the stresses are removed are said be
- A. elastic
- B. elastomer
- C. plastic
- D. thermoplastic
65
Which of the following statements about mass and weight are correct? i. Weight is the force of gravity on a body. ii. The mass of a body is the quantity of matter in the body. iii. The weight of a body is greatest at the equator. iv. The mass of a body is greatest at the poles
- A. i and ii only
- B. i and iii only
- C. ii and iv only
- D. iii and iv only