A pure substance is something that occurs in nature. An element is made up of one type of atom only and cannot be split further.
In simpler terms it is true an element is a substance that is made of ONE type of atom
Answer:
constitution is important because it ensures that those who make decisions on behalf of the public fairly represent public opinion. It also sets out the ways in which those who exercise power may be held accountable to the people they serve.
They became enslaved people who work for free
Answer:
75%
Explanation:
In order to understand this question you need to understand the matching law first. The matching law provides the density of reinforcement or the rate of reinforcement if more than one response is available simultaneously to the individual. Here, two responses are available which are left key, 60 reinforcers per hour, and right key, 20 reinforcers per hour. This provides the ratio between the two reinforcers which is 60:20 or 3:1 in favor of left key. Here, one has to make a prediction only for left key and based on 3:1 ratio it can be said that 75% of pigeon will make their responses on the left key.
