Remember force=springconstant x extension (f = k xx)
1. if a spring starts at a length of 13cm, and it extends to a length of 21cm - what is the
extension of the spring? can you convert you answer into meters?

0.08 meters.

Explanation:

Extension= increase in length (∆L).

E= 21-13=8 cm

To convert cm to m, divide by 100

8 cm= 0.08 m.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

i would say