A person who exercises in extreme heat can lose salts that contain potassium and sodium through his or her sweat. What can you infer about the effect of overexertion on the nervous system?
A sunbather is lying on a floating raft that is stationary. She then gets up and walks to one end of the raft. Consider the sunbather and raft as an isolated system. (a) What is the velocity of the center of mass of this system while she is walking? Why? (b) Does the raft itself move while she is walking? If so, what is the direction of the raft's velocity relative to that of the sunbather? Provide a reason for your answer.
Identify two of the simple machines in a bicycle.
To test your knowledge, discuss the following topics with a study partner or in writing, ideally from memory Gross anatomy of the penis and the microscopic anatomy of its three erectile tissues