That researcher was Ivan Pavlov.
These psychic secretions are related to his experiments with dogs - he noticed that dogs would start salivating at the mere sight of food, or person delivering them food, or even the sound of their footsteps (because they knew food was coming). That's why he started experimenting even further - each time he brought them food, he would ring a bell, so eventually the dogs would start salivating every time they heard a bell because they were expecting food.
When a nut or bolt is extremely tight, a lubricant is used so that the teeth in the ratchet head are not damaged.
<h3>What is a lubricant?</h3>
A lubricant refers to the oil that is applied on the metal parts of objects to prevent rusting or damage. A good ratchet is often identified by the number of teeth it has and since its parts are metallic in nature, it is vital that they are regularly lubricated to keep them in shape.
Sometimes, the ratchet can also be degreased during maintenance. The problem that most ratchets tend to have stem from torquing excessively.
Learn more about lubrication here:
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Answer:
retrieval cues
Explanation:
Retrieval Cues: These are stimuli that help in memory retrieval. Retrieval cues help someone to access memories that are stored in long-term memory and helps in bringing them in conscious awareness. The recalling of memory becomes easier in the presence of retrieval cues.
Example of recall: Giving an answering to a question on a fill-in-the-blank test.
Answer:
B. an increase in primary-sector jobs
Explanation:
I took the test.
