A person pushing a stroller starts from rest, uniformly accelerating at a rate of 0.50 m/s2. What is the velocity of the stroller after it has travelled
9.0 m? (vf^2= vi^2+2aAx)
1 m/s
2 m/s
3 m/s
4 m/s

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

Earth's atmosphere is composed of mostly two gases. name the two gases that make up the majority of the atmosphere and use the pie chart to tell the percentages of each.

When can a theory be modified if a new type of technology allows for new observations that raise new questions? a-immediately, while the questions about the theory are being asked b-after new hypotheses related to the theory are tested in experiments c-only after the new observations disprove all parts of the theory d-while scientists begin to think about how the theory could improve