In experimental research, it is important to provide precise definitions of both dependent and independent variables. With – definitions, the variables are described –, to make clear exactly what manipulations and –the experiment involves. This is important for later – of the results by other researchers.

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.

Explain why you think this diagram shows what happened to the carbon in the biodome.