A rower in a boat pushes the water backward using an oar. What direction will the rower and the boat move?

A) The water does not exert any force on the rower or the boat because the rower is doing the pushing. The water does not exert any force on the rower or the boat because the rower is doing the pushing.

B) It is impossible to say unless you know whether the rower is accelerating or not. It is impossible to say unless you know whether the rower is accelerating or not. , ,

C) Backward, because objects interact by exerting forces on each other in the same direction. Backward, because objects interact by exerting forces on each other in the same direction. , ,

D) Forward, because action-reaction forces are directed in opposite directions. Forward, because action-reaction forces are directed in opposite directions. , ,

Mr. j, age 42, is a construction worker in las vegas. he recently noticed that a mole on his face seemed to be getting larger and darker. at first he did not worry because he was in the sun a lot and assumed the change may have been caused by sunburn. after a month, not only was the mole larger and darker, but it appeared to be “bumpy.” his doctor diagnosed a malignant melanoma skin cancer following biopsy of the nevus. mr. j reports pain in his right shin that does not go away when he puts his feet up or sleeps. discussion questions 1. relate mr. j’s skin changes to the warning signs for malignant melanoma. (see malignant melanoma.) 2. discuss the normal progression of this malignancy. what is the significance of the bone pain that mr. j is experiencing? (see malignant melanoma.) 3. discuss the treatment available for this patient and the prognosis for recovery. (see malignant melanoma.)