Pls. answer as many as you can in the following questions. I'm not sure in all of my answers. I just answer them using my best. 1. The problem statement, all variables and given/known data 1. Why are persons confined to bed less likely to develop bedsores on their bodies if they use water bed than ordinary mattress? 2. Which do you suppose exerts more pressure on the ground, an elephant or a lady on spike heels? Which most likely to make dents on a linoleum floor? 3. Why do your body get more rest when you're lying than when you're sitting? Why is blood pressure measured in the upper arm at the elevation of your heart? Is blood pressure on your leg greater? 4. The weight of a human brain is 15 N. The buoyant force supplied by the fluid around the brain is about 4.5 N. Does this mean that there must be at 14.5 N of fluid surrounding the brain? Prove your answer. 5. When floating why do you tend to float lower in the water when you exhale? 6. Will breaking a T.V. picture tube cause it to implode or explode? Why? 7. Would it be more slightly difficult to draw soda through a straw at sea level or on top of very high mountain? Why? 8. When a shower water turned on full blast, the shower curtain move in. Why? 9. Why does the fire in fireplace burn more briskly on a windy day? 10. Small bubbles of air are released by a scuba diver deep in the water. As the bubbles rise, do they become larger, smaller, or stay about the same size? Explain. 2. Relevant equations 3. The attempt at a solution 1. Because it is softer than the ordinary mattresses. Normal mattresses are a very unforgiving surface, and they force your body into an unnatural position. They put undue pressure on bony areas and do not allow the spine or joints to adopt a natural relaxed shape. Your weight is distributed in water bed. 2. Lady wearing spike heels because small area means great pressure. I don't know what's the answer in the follow-up question. 3. Because while you're in vertical position, your heart has to pump harder. It is a place representative of the pressure that your heart is experiencing and also a standard place that yields consistent results. Pressure increases as depth increases or distance from heart to leg if you are vertical. 4. (I don't know) 5. Because air is less dense than water. When you inhale, you have air in your lungs that will also make the buoyant force increase. When you exhale, you'll release the air and the BF will decrease. 6. It will implode because the tube is a vaccuum. When you put a hole on it, The air will go through that hole until the pressure outside and inside are equal. 7. Drinking through a straw is slightly more difficult atop a mountain. This is because the reduced atmospheric pressure is less effective in pushing soda up into the straw. 8. It's Bernoulli's Principle. There are two equal pressure in the room. One is outside the curtain and the other is inside the curtain. When you turn on the shower, it will distract the pressure inside the curtain that will make the pressure inside the curtain reduce. Now, the pressure outside the curtain is now greater than the other one so the pressure outside can now push the curtain. 9. On windy days, the wind passing over the top of the chimney draws more air up the flue. This draws more air from the house into the fireplace, providing more oxygen to the fire, causing it to burn more intensely. 10. It will become large because in pressure, when the depth is great, the pressure is great. When the deeper you go in an ocean, the temperature is low. Since the bubble is going up, the temperature goes up that will make the bubble expand because of the characteristics of a matter. And also the pressure will be less because the depth is not that great anymore.