Thank you :) Joe looks at a bird and says it is moving to the right. Shmo looks at the same bird at the same moment, but he says it is moving to the left. Which is true?

a. Joe and Shmo must be in different reference frames.
b. The bird is actually not moving at all.
c. Joe and Shmo must have the same speed and direction (This answer is incorrect)
d. One of them is right and one of them is wrong.

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.