To reinforce social behavior teachers should

a. choose one staff member to deal with unacceptable behaviors.
b. give children words to use in place of physical aggression.
c. try not to involve parents in “school rules.”
d. foster independence in children.

Choosing to reinforce behaviors sometimes mean adding a pleasurable consequence or a removing an unpleasant one – these are the basic building blocks of operant conditioning, a concept posited by B. F. Skinner.

From the options given, the most suitable example of reinforcement would be (B) give children words to use in place of physical aggression. By giving punishments to children who use physical aggression and giving appropriate reward for children who use words instead, the teacher would be able to change the children’s behaviors.      

ek = (m·v2) / 2

v - velocity of system after the collision

m = m1 + m2

ek = (m1 + m2) ·v2/2

ek = (200 + 250) ·2,32/2 = 450·5,29/2 = 1190,25 j

like many students at university, you may be unhappy about the results you attain in exams. you may feel that even with all you are doing there must be something more -- or different-- you could be doing to get better grades. we have all at some time or other heard of that student who only studies a couple of hours for final exams and scores a's every time. we stand in awe of those who seem to breeze through without undue effort and seem to need very little in the way of studying to nail an exam. the reasons for success, in what i think are the vast majority of cases, are less esoteric than many students think: successful students consistently apply a series of productive strategies with view to attaining clearly identified learning and grade goals throughout the academic term.