Fluids+Stuff


 * Page 174 Questions:**


 * 1.Define pressure.**


 * Pressure is a force. **


 * 2. a. What unit is used to measure pressure?**


 * Pressure (P) = force (F) / Area (A) or P F/A **


 * b. What is another way to express this unit?**


 * N/m2 or (Pa) **


 * 3.Explain why fluid pressure varies with depth in a) liquids, and b) gases.**


 * Fluid pressure varies with depth between air and gas because liqiuds are much heavier than gases. **


 * 4.Why do you think airplane cabins are "pressurized"? If a plane door was to open at a high altittude, which direction would the air move, in or out of the plane? Why?**


 * The air would move out the plane because air likes to move from its HIGH pressure system to the LOW pressure system, which would be outside where the air was moving quickly. **


 * 1.What is hydraulic power?**


 * Hydraulic Power is composed from the force or energy of moving water. **


 * 2. What is pneumatic power?**


 * Pneumatic power is compressed air power. **


 * 3. Give one example for #1 and #2.**


 * An Example for the force of moving water is a syringe, it has a handle that can be pumped and used to push water in and out of the syringe, creating Hydraulic Power. ** ** An example of Pneumatic power is a spray-paint bottle. Air molecules are squished inside and when you press the button on the top of a bottle, the air is finally provided with an exit, and the air decompresses. **


 * 4. What is a hydraulic system in our bodies?** **

The blood; it gets pumped out to the rest of our bodies. **


 * a. What does the heart do in this system?**


 * The heart pumps blood to the rest of our bodies; it takes in fluid and pushes out fluid (blood). **


 * b. Explain the systole and diastole pressure in blood pressure.**


 * The systole and diastole During each heartbeat, varies between a maximum (systolic) and a minimum (diastolic) pressure. **


 * c.What is a normal blood pressure?**


 * A normal blood pressure is 120/80. **


 * d.What happens if you have high blood pressure for long periods of time?

When blood pressure is high at all times, there is continuous increased force on blood vessel walls and it can damage blood vessels and organs, including the heart, kidneys, eyes, and brain. Source: http://www.ehealthmd.com/library/highbp/HBP_whatis.html **


 * e. Explain how blood moves up your leg.**


 * The pumping of the heart causes pressure that can push blood up your leg...against gravity. **

A system that compresses air in your body. **
 * 5.What is a Pneumatic system in our bodies?**


 * a.What is going on when your ears “pop”?**


 * When your ears "pop", it's a result of air pressure changing w/ altitude and your ear drums adjusting to the change in pressure.

b.Where is the eardrum located in your ear?

Your eardrum is part of the outer ear and part of the middle ear.

c.Explain what is happening in your body when you swallow and when you yawn.

When you swallow, the muscles in your esophogus push the food or drink down your throat. When you yawn, its a way for your body to get extra oxygen that it needs. Your diaphram goes down, and air is forced into your lungs, making it hard to stop a yawn. **


 * 6. Explain how your cartisen diver went up and down in the bottle. Draw a Labeled diagram that helps your explanation.**
 * When the diver is at the top of the bottle, it is full of air, which makes it float because it is less dense than water. When you squeeze the bottle, it puts pressure on the diver and the water gets forced in, making the diver sink.

**


 * 7.Explain the result of the “wholly bottle”. Include a labeled diagram or picture to help you explanation.**


 * When you poke holes at different heights in a bottle filled with water, the holes furthest down will let out the most water because the weight of the water is more at the bottom. Just like if football players dog pile each other, the pressure on the poor guy at the bottom is more intense than on the dude sitting on top.

**


 * 8.Find 5 hydraulic systems that happen in everyday life.**


 * **Name** || **Picture** || **What does it do?** || **Where did you find it?** ||
 * **T-bot** || [[image:http://docs.google.com/File?id=dfgb8dfw_4dpqjd9f2_b width="250" height="246"]] || **A t-bot helps people learn about hydraulics by seeing close-up how hydraulics work.** || **http://www.advance-school.com/sharedimages/product/Large/L_TBotSyringeRobot.jpg** ||
 * **A tractor's Hydraulic system.** || [[image:http://docs.google.com/File?id=dfgb8dfw_5dp6fj74j_b width="290" height="289"]] || **This hydraulic system for a tractor will help to lift heavy loads when a tractor bucket or other attchment is put on.** || **http://www.sigma4.it/en/img/iron_h.gif** ||
 * **Blood** || [[image:http://docs.google.com/File?id=dfgb8dfw_6f7gjtxg4_b width="300" height="306"]] || **Blood is pumped through our bodies to protect us from bacteria, get the bodies' materials where they need to go, and to help with gas exchange (Carbon Dioxide and Oxygen).** || **http://thumbs.dreamstime.com/thumb_117/1170095307wwAFbW.jpg** ||
 * **Spritzer Bottle Pumps** || [[image:http://docs.google.com/File?id=dfgb8dfw_8htmzmcvd_b width="101" height="175"]] || **Bottle pumps, when the top button is pushed on, suck fluid up through a connected tube to shoot out the opening at the top of the spritzer.** || **http://www.tolcocorp.com/bb/images/300616.jpg** ||
 * **A hydraulic hoist on a dumptruck.** || [[image:http://docs.google.com/File?id=dfgb8dfw_12ddx5b7dk_b width="400" height="373"]] || **A hydraulic hoist is used to push up the front of the bucket on a dump truck, which tips the load out the back.** || **http://coolest-birthday-cakes.shippony.com/images/vehicles/construction/construction-cake-10.jpg** ||


 * 9.Find 5 pneumatic systems that happen in everyday life.**

truck suspension Air bags use compressed http://image.dieselpowermag.com/f/8298290+w750+st0/0511dp_06z+Ford_F650+Rear_Air_Bag_Suspension.jpg air to act as a cushion between the truck and the frame.**
 * **Name** || **Picture** || **What does it do?** || **Where did you find it?** ||
 * **T-bot** || [[image:http://docs.google.com/File?id=dfgb8dfw_9fg6gfrf5_b width="250" height="246"]] || **A t-bot helps people learn about hydraulics by seeing them close-up. The syringes that move the t-bot also compress air.** || **http://www.tolcocorp.com/bb/images/300616.jpg** ||
 * **Your throat or lungs** || [[image:http://docs.google.com/File?id=dfgb8dfw_10smhzn4fr_b width="372" height="365"]] || **when you're drinking, sometimes an air bubble will form inside the liquid and you will try to swallow it when it is halfway down your throat. It hurts, and if the bubble is very obstinate, it will stay there and the air inside will become compressed from your trying to swallow the bubble.** || **http://bettercancersolutions.com/alkalinity/lungs.gif** ||
 * **Air compressor** || [[image:http://docs.google.com/File?id=dfgb8dfw_11ft38vhd4_b width="350" height="350"]] || **An air compressor is used for cleaning things off, paint applications and moving air cylinders.** || **http://bettercancersolutions.com/alkalinity/lungs.gif** ||
 * **Bicycle pump** || [[image:http://docs.google.com/File?id=dfgb8dfw_13cb9r69dd_b width="280" height="400"]] || **A bicycle pump compresses air when air is pumped from it into a bike tire.** || **http://www.bicycleaccessories.us/bicycle-pump-400.jpg** ||
 * Air bags on a
 * Air bags on a
 * Sources: [|www.impactrm.com/html/p.html], [], http://www.ehealthmd.com/library/highbp/HBP_whatis.html, Science Power 8 textbook,**