Some countries didn't have stuff that other countries had, so they used to trade to grow their community and for their people to survive. Trading was important to have all their goods they wanted.
"Pavlov's dog" experiments with bell ringing as the association, operating on food being served after the bell's chime, involved him measuring the dogs' salivation quantity as a result. It was a study on classical conditioning.
He showed that two things become associated because there is anticipation of reward.
Answer:
Explanation:
The Following can be categorized by Exact or Uncertainly
(a)The number of eggs in a basket:Exactly
Because eggs is countable
(b)The mass of a dozen eggs:Uncertain
Because each egg can weigh differently
(c)The no of gallons of gasoline necessary to fill an automobile gas tank:Exactly
Because Volume of tank is known
(d)The number of cm in 2 m:Exactly
(e)The mass of a textbook:Exactly
(f)Time required to drive from San Francisco to Kansas city at an average speed of 53 mi/h: Uncertain
Because events like traffic and accidents might cause delay.
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