Week 3 discussion DQ1 The United States Navy Diving Manual contains a wealth of information about diving from the history of diving to underwater physics and physiology. Start by browsing the U.S.Navy Diving Manual (located within the weekly readings) and then post a response to the following questions: How do the pressure variations with depth affect our ability to explore the ocean? In particular, what are some of the challenges of scuba diving? DQ2 Energy.gov is the official website of the United States Department of Energy (located within the weekly readings). On this website, you can find a variety of helpful resources, including resources on how to conserve energy. Read the information about thermostats then consider the following question: On a hot summer day, you need to leave your house for 30 minutes. To use the least amount of energy, should you turn off your air conditioning system, turn up the thermostat, or leave it set at your normal temperature? For those of you more familiar with cold winter days, you may consider the same about your heating system on a cold winter day: Should you turn it off, turn the thermostat down, or leave it set at your normal temperature? Explain your answer.