MCQ
Which hormone is secreted by the pineal gland?
- AVasopressin
- BProlactin
- ✓Melatonin
- DOxytocin
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`y_1 = 5 sin 2pi(75t - 0.25 x)`
`y_2 = 10 sin 2pi(150t - 0.50 x)`
The intensity ratio `"I"_1/"I"_2` of the two waves is ______