Phases of Cycles

A is in phase with
1. I
2. C
3. F
4. H
F is 180^o out-of-phase with
1. D
2. A
3. G
4. I
Which letter is 90^o ahead of J?
1. K
2. H
3. L
4. I
Which letter is in-phase with L?
1. H
2. M
3. C
4. J
Which letter is 180^o out-of-phase with M?
1. C
2. A
3. D
4. H
Which letter is 270^o out-of-phase with E?
1. H
2. M
3. J
4. C
Which letter shows a pendulum that is in-phase with pendulum A?
1. E
2. F
3. G
4. H
Which letter shows a pendulum that is in-phase with pendulum B?
1. E
2. F
3. G
4. H
Which letter shows a pendulum that is in-phase with pendulum C?
1. E
2. F
3. G
4. H
Which letter shows a pendulum that is in-phase with pendulum D?
1. E
2. F
3. G
4. H
Which letter shows a pendulum that is 180^o out-of-phase with pendulum A?
1. E
2. F
3. G
4. H
Which letter shows a pendulum that is 180^o out-of-phase with pendulum B?
1. E
2. F
3. G
4. H
Which letter shows a pendulum that is 180^o out-of-phase with pendulum C?
1. E
2. F
3. G
4. H
Which letter shows a pendulum that is 90^o ahead of pendulum D?
1. E
2. F
3. G
4. H
Which letter shows a pendulum that is 90^o behind pendulum A?
1. E
2. F
3. G
4. H
Which letter shows a pendulum that is 360^o out-of-phase with pendulum C?
1. E
2. F
3. G
4. H