John is a field researcher who studies social interaction within motorcycle groups. he is not an accomplished rider himself, but he is able to obtain jobs at various motorcycle shops that allow him to observe members of motorcycle groups and to socialize with them after work. he lets members think that he is a regular employee and does not mention his research role to anyone connected with the groups. his note-taking is done after hours in his own apartment. his role as a field research is that of a: a. complete observer
b. partial observer
c. participant and observer
d. complete participant

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)