First, he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then, he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance A is a catalyst.
Answer:
The Doctrine of Specific Nerve Energies has been and continues to be enormously influential in the physiology, psychology, and philosophy of perception. In simple terms, the Doctrine states that we directly perceive in the first instance the activity of our nerves, rather than properties in the external world.
Answer:
Excess amount of Bilirubin in the blood stream.
Explanation:
When there is an excess amount of bilirubin in the blood stream, it causes jaundice, with symptoms like; yellow eyes and skin, among others.