Answers to 1/11 homework.

1a. 1.5 s
b. no tension - no period
2. (2gl(1-cos theta))^1/2
3. a. 5.43 hz
b. 0.0684 s^-1
c. 20.3 s
4. a. 2.4 x 10^4 N/m
b. 0.63 s
5. a. 130 N/m
b. 9.6 cm