You are camping in a remote region. the next day, you plan to take a long hike and return to camp before dusk. a friend suggests that after hiking, you might want to enjoy a warm shower. she suggests that before you head out in the morning, you should suspend a strong, waterproof, black bag full of about five gallons of water so that it sits in the sunshine all day. when you return, the water should be warm, and you can enjoy a luxury because of good planning. the next day, when you return from your hike, you enjoy a warm shower at your campsite! the process that you used to get a warm shower uses