The mass of the sandwich is 35 g.
Mass is the amount of matter contained in a body.
Total mass of a composite body such as a sandwich with, bread, jelly and peanut butter, is the sum of the masses of bread, jelly and peanut butter.

The mass of the sandwich is 35 g
This is just a guess but I think it is desalinate
Answer:
B.F Skinner
Explanation:
Ope-rant conditioning is the process of reward and punishment. This process was developed by B.F Skinner. He was the father of ope-rant conditioning and his work was based on Thorndi-ke law of effect. According to the law of effect, the pleasant behavior affected by the consequences and repeated many times whereas the unpleasant behavior is less likely to be repeated by the stimulus. B.F Skinner introduced the term reinforcement that follows the law of effect.
The ope-rant conditioning is being used in educational settings as well. Thus the model of ope-rant conditioning was based on shaping the child's behavior through reinforcement of random act and that was created by B.F Skinner.
Hitler came at a time when the German people were desperate because of the economic situation, partially caused by the war reparations dictated by the Treaty of Versailles.
He mobilised the nation to work and pushed the blame at the seemingly richer Jews and the desperate people saw some hope in him.