Activity 9.3.3 What are the daily life phenomena associated with pressure by Er Wan Lin https://padlet.com/er_wan_lin/activity933pressure Please follow the instructions in the padlet en-us 2022-01-03 07:11:06 UTC 2022-01-20 03:38:33 UTC hello@padlet.com Part 1 er_wan_lin https://padlet.com/er_wan_lin/activity933pressure/wish/1971708718 1.Get into groups of 4
2.Number yourselves from 1 to 4
3.Each of you will take 1 case study from page 24-25 of the activity book. The appropriate links and resources are placed on padlet and you can feel free to google more. 
4.If you have time you can look at the other links. 
Please key in your answers to Q 1 and Q2 in 2 separate posts and title your post with the question number and your name
]]> 2022-01-03 07:17:13 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1971708718 Retractable heels er_wan_lin https://padlet.com/er_wan_lin/activity933pressure/wish/1971709735 2022-01-03 07:18:27 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1971709735 Suction cup phone holders er_wan_lin https://padlet.com/er_wan_lin/activity933pressure/wish/1971712127 2022-01-03 07:21:13 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1971712127 Safe straw er_wan_lin https://padlet.com/er_wan_lin/activity933pressure/wish/1971712433 2022-01-03 07:21:35 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1971712433 er_wan_lin https://padlet.com/er_wan_lin/activity933pressure/wish/1971712615 https://www.youtube.com/watch?v=yrWqWEtSe2Q ]]> 2022-01-03 07:21:46 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1971712615 Submarine er_wan_lin https://padlet.com/er_wan_lin/activity933pressure/wish/1971712904 2022-01-03 07:22:03 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1971712904 er_wan_lin https://padlet.com/er_wan_lin/activity933pressure/wish/1971713089 https://www.explainthatstuff.com/submarines.html ]]> 2022-01-03 07:22:16 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1971713089 group response padlet er_wan_lin https://padlet.com/er_wan_lin/activity933pressure/wish/1971724010 2022-01-03 07:33:33 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1971724010 eve q1 eve_yap_ying_en https://padlet.com/er_wan_lin/activity933pressure/wish/1999635414 the air pressure within the suction cup is alot lower than outside the suction cup]]> 2022-01-19 06:07:50 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999635414 nataliiiiii https://padlet.com/er_wan_lin/activity933pressure/wish/1999635895 1) When the patient drinks from the straw, the air will first be sucked making the air pressure in the straw decrease. Therefore the air pressure present on the liquid of the glass will help push the liquid up the straw.]]> 2022-01-19 06:08:13 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999635895 eve q2 eve_yap_ying_en https://padlet.com/er_wan_lin/activity933pressure/wish/1999636163 the texture of the surface, the weight of the phone.]]> 2022-01-19 06:08:26 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999636163 Maegan https://padlet.com/er_wan_lin/activity933pressure/wish/1999637706 1)the area of contact between the straw and the mouth is smaller, thus pressure exerted on the straw is higher ]]> 2022-01-19 06:09:41 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999637706 fayth https://padlet.com/er_wan_lin/activity933pressure/wish/1999637771 1. when the patient sucks in the air using the straw to allow water to flow in, the air pressure in the straw decreases ]]> 2022-01-19 06:09:44 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999637771 haniyya, haley, elaine, dharshini b https://padlet.com/er_wan_lin/activity933pressure/wish/1999638241 1. water is heavier compared to air. The deeper the submarines go, the higher the force hence, the pressure exerted on the submarine is higher. 
2. it has to be thick, waterproof and strong

]]> 2022-01-19 06:10:07 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999638241 nataliii https://padlet.com/er_wan_lin/activity933pressure/wish/1999638550 2)Since there is a hole above the liquid level of the straw, the air pressure will not decrease no matter how much air that leaves the straw since the hole will allow more air to enter. Therefore the patient isnt able to drink their liquid.]]> 2022-01-19 06:10:20 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999638550 chloe tan https://padlet.com/er_wan_lin/activity933pressure/wish/1999638885 1. air pressure pushes down on the liquid in thr cup. when we inhale to drink, only the liquid in the straw will go upwards as the air pressure in the straw decreases
2. the hole allows air pressure to continuously enter the straw and the air pressure will not decrease and so no water can enter the straw??]]> 2022-01-19 06:10:36 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999638885 celeste https://padlet.com/er_wan_lin/activity933pressure/wish/1999639453 1) the air pressure within the suction cup is lower and on the outside is higher.
2)the surface has to be clean so its smooth and able to stick,the suction cup has to be curved so that it can compress the air ]]> 2022-01-19 06:11:05 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999639453 Fayth https://padlet.com/er_wan_lin/activity933pressure/wish/1999639768 2. as air is constanly entering the straw through the hole and therefore water cannot enter the straw.]]> 2022-01-19 06:11:23 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999639768 Anees https://padlet.com/er_wan_lin/activity933pressure/wish/1999640013 The hull of a submarine must be able to withstand the forces created by the outside water pressure being greater than the inside air pressure. The outside water pressure increases with depth and so the stresses on the hull also increase with depth.]]> 2022-01-19 06:11:36 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999640013 Daniella, Dharshini E, Esther, Maya https://padlet.com/er_wan_lin/activity933pressure/wish/1999640308 After inhaling the air present in the straw, this causes the air pressure to decrease. The air pressure present on the liquid of the glass pushes the liquid into the straw, causing the water to move upwards.

The hole is prevents the liquid from moving upwards as the air or water escapes through that hole.]]> 2022-01-19 06:11:51 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999640308 keira toh( in fayth,jamie and avril group) https://padlet.com/er_wan_lin/activity933pressure/wish/1999640411
1.The hull of a submarine must be able to withstand the forces created by the outside water pressure being greater than the inside air pressure. The outside water pressure increases with depth and so the stresses on the hull also increase with depth.
2. some physical properties is that the outer hull must be waterproof, which is usually made of metal ]]> 2022-01-19 06:11:56 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999640411 maegan https://padlet.com/er_wan_lin/activity933pressure/wish/1999640644 the hole allows more air to escape thus water cannot go in his mouth even though alot of force is used ]]> 2022-01-19 06:12:07 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999640644 elizabeth https://padlet.com/er_wan_lin/activity933pressure/wish/1999640730 1. pressure is increased because more force is needed to suck in the water from the valve into the chamber and into the patient's mouth]]> 2022-01-19 06:12:12 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999640730 eunice and claris https://padlet.com/er_wan_lin/activity933pressure/wish/1999641043 1. water has a higher force compared to air. The deeper the submarines go, the higher the force therefore the pressure exerted on the submarine is higher. 

]]> 2022-01-19 06:12:27 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999641043 https://padlet.com/er_wan_lin/activity933pressure/wish/1999641374 the pressure in the suction cup is lower than the outside of the suction cup allowing the cup to stick on the car glass without falling


]]> 2022-01-19 06:12:45 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999641374 eunice and claris https://padlet.com/er_wan_lin/activity933pressure/wish/1999641506 2.  It must be hard, waterproof, resistant and strong]]> 2022-01-19 06:12:52 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999641506 elizabeth https://padlet.com/er_wan_lin/activity933pressure/wish/1999641775 2. air keeps entering through the hole so water cannot enter the straw]]> 2022-01-19 06:13:04 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999641775 silvia https://padlet.com/er_wan_lin/activity933pressure/wish/1999641894 air pressure inside cup is lower than outside of cup 

if the surface is dry or wet, weight of phone]]> 2022-01-19 06:13:10 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999641894 nadzirah https://padlet.com/er_wan_lin/activity933pressure/wish/1999642193 1a) area of contact and force
1c) the area of contact between the toes and the high-heeled shoe is smaller, so pressure exerted on the foot is greatest.
2) If your feet are tired from the high-heeled shoes, you are able to retract the heel and use the shoe as a flat-heeled shoe.]]> 2022-01-19 06:13:23 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999642193 ulfa https://padlet.com/er_wan_lin/activity933pressure/wish/1999642612 1) the air within the suction cup is lower compared to outside.

2) the type of surface ,weight and length of phone]]> 2022-01-19 06:13:42 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999642612 jamie https://padlet.com/er_wan_lin/activity933pressure/wish/1999642637 1. the pressure outside the cup is greater than the lower pressure inside the cup causing suction
2. surface area needs to be smooth ]]> 2022-01-19 06:13:44 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999642637 dharshini b, elaine, haniyya, haley Q1 https://padlet.com/er_wan_lin/activity933pressure/wish/1999642810 The pressure on the inside of the suction cup is a lot lower than the air pressure outside the suction cup, causing it to stick to a surface.]]> 2022-01-19 06:13:53 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999642810 tareena https://padlet.com/er_wan_lin/activity933pressure/wish/1999642991 1)the air pressure inside the suction cup is higher than the air pressure outside the suction cup.
2)the material of the suction cup.he surface of the suction cup should be clean and the cup should be rounded to ensure that it would stick.

]]> 2022-01-19 06:14:03 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999642991 cheralynn q1 https://padlet.com/er_wan_lin/activity933pressure/wish/1999643104 a .the area of contact and weight
c)  the area of contact between the toes and the ground decreases with causes more pressure to be exerted ]]> 2022-01-19 06:14:09 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999643104 dharshini, elaine, haniyya, haley Q2 https://padlet.com/er_wan_lin/activity933pressure/wish/1999643252 The shape and texture of the suction cup affects its ability to stick]]> 2022-01-19 06:14:16 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999643252 Elaine https://padlet.com/er_wan_lin/activity933pressure/wish/1999643299 When a patient uses a straw to drink , they inhale the air in the straw causing less air pressure in the straw. Thus ,the air pressure on the liquid to push it in the straw allowing the patient to drink]]> 2022-01-19 06:14:19 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999643299 maya https://padlet.com/er_wan_lin/activity933pressure/wish/1999643684 Q1.Oceans are most turbulent where wind meets water: on their surface. It's dark and difficult to see, there's no air to breathe, and intense water pressure makes people uncomfortable and claustrophobic. Submarines are designed to carry people safely through this very harsh environment.
q2 . the outer wall should be heavier and the area of contact must be lower

]]> 2022-01-19 06:14:38 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999643684 elaine, haniyya, haley & dharshini https://padlet.com/er_wan_lin/activity933pressure/wish/1999643735 1a) area of contact and force
1b) drawn in the book 
1c) the heel. the area of contact between heel and surface is smaller compared to the front. therefore the pressure exerted is higher. the weight remains constant
2) a flat surface means the same pressure everywhere, so feet won't be as tired and not exerted

]]> 2022-01-19 06:14:40 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999643735 victoria https://padlet.com/er_wan_lin/activity933pressure/wish/1999644942 1. the metal of the submaarine can only withstand a certain amount of pressure before it buckles or collapses. if that happens, the people in the submarine will die due to the high pressure.

2. it should be thick so it can withstand the high pressure underwater.]]> 2022-01-19 06:15:36 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999644942 cheralynn q2 https://padlet.com/er_wan_lin/activity933pressure/wish/1999917368 if your feet hurt from standing too long or get tired you can make it a flat shoe which will make it not so painful ]]> 2022-01-19 09:05:34 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999917368 rasika https://padlet.com/er_wan_lin/activity933pressure/wish/1999930831 qn one:
generally water is much more heavier than air. the deeper the submarines go underwater, the more the pressure exerted on them. submarines are built in such a way that they are able to hold off forces using the outer and inner walls. this helps the submarines to stay upright and stable despite harsh pressure levels at times.]]> 2022-01-19 09:12:51 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999930831 rasika https://padlet.com/er_wan_lin/activity933pressure/wish/1999938444 qn two:
waterproof and strong? can't think of more properties sorry]]> 2022-01-19 09:16:36 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999938444 Elaine https://padlet.com/er_wan_lin/activity933pressure/wish/1999960112 2) The hole in the straw above the liquid level allows air to escape, thus there is no air pressure in the straw to push the liquid up .]]> 2022-01-19 09:28:29 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999960112 Louisa, Rasika, Tareena, Vaiishnavi Q1 https://padlet.com/er_wan_lin/activity933pressure/wish/1999961508 1a) Area of contact force and force
1b) The toe area 
1c) The area of contact between the toe and the shoe is smaller so pressure exerts on the toes greatest.
2) It helps our feet be lesser painful after being in heels for a long time.]]> 2022-01-19 09:29:18 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999961508 Daniella, Dharshini E, Esther, Maya https://padlet.com/er_wan_lin/activity933pressure/wish/1999983649 1a) The area of contact between 2 surfaces and the force applied. 
1c) When you are tip-toeing, the weight is all front part of the foot. Although the back of the heel has a much smaller area of contact, when you are wearing high-heeled shoes, you will land on your toes first which causes all the weight and pressure to transfer to the toes. 
2) Pressure = Force/Area. When you where high-heeled shoes, although the force applied is constant, the area of contact between the floor and the sole of the shoe decreases. Thus, the pressure exerted on the sole on the shoe increases. Therefore, after wearing them for some time, your feet will start to feel pain. Hence, you will feel like changing to a flat-heeled shoe, which although the force applied is constant, the area of contact between the sole of the shoe and the floor increases. Thus, the pressure exerted on the shoe decreases, causing the feet to feel less painful. This helps as it will be more convenient than compared to worrying about having to bring two shoes along. ]]> 2022-01-19 09:40:50 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/1999983649 Avril (group:Avril,Fayth,Jamie and Keira) https://padlet.com/er_wan_lin/activity933pressure/wish/2000014055 1a) The area of contact with the ground and the weight of the object.
1c)As the pressure of the of the shoe is being pushed forward so the pressure is getting exerted the most around the front of the feet.
2)It helps, as when the high heels feel uncomfortable you can press a button and turn them into flat-heeled shoes. Because of that, it reduces the chances of people getting knee problems or lower back pain as they can convert it into a more comfortable shoe anytime.

]]> 2022-01-19 09:57:41 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/2000014055 Thana https://padlet.com/er_wan_lin/activity933pressure/wish/2000023384 1a)Force,Area
c)The toe has a greater area of contact than the heel of the leg.Hence there's more force exerted on the heel of the foot.Hence the heel of the leg would face the most pain.
2.So when the user of the product faces some pain they can easily remove the heel and turn it into flats which will reduce the pain and also reduce the probability of health problems like back pain and knee pain.

]]> 2022-01-19 10:03:22 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/2000023384 dharshini E (myself, daniella, maya, esther) https://padlet.com/er_wan_lin/activity933pressure/wish/2000052227 Q1) A low pressure region is created inside the suction area. It's actualy the atmospheric pressure outside the cup, pressing down on the low pressure area inside the cup, that creates the suction.

]]> 2022-01-19 10:19:46 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/2000052227 chloe ng 2021_chloe_ng_wen_xuan https://padlet.com/er_wan_lin/activity933pressure/wish/2000056504 1. a submarine can float when the mass of water that displaces is equal to the mass of the submarine. this displaced water cause an upward force called buoyancy.
2. the outer should be waterproof, strong and hard.]]> 2022-01-19 10:22:22 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/2000056504 https://padlet.com/er_wan_lin/activity933pressure/wish/2001879776 .

]]> 2022-01-20 03:01:38 UTC https://padlet.com/er_wan_lin/activity933pressure/wish/2001879776