- #1
Clara Chung
- 304
- 14
Homework Statement
Refer to the photos, question 21 and 22(the one with a helicopter)
Homework Equations
Both answers are A
The Attempt at a Solution
for question 21, if the counts to ten, there are 9 intervals. I divide 20 by 9 and divide it again by 2 and get 1.1s not 0.5s.
for question 22. I think it is C. Because the first reflected pulse has traveled 2h and the second reflected pulse has traveled 4h. I think it is impossible for the answer to be A, the pulse should travel slower in water.