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703 results for “pressure”
Explain pressure differential in the pitot-static system. Classifying flight instruments. Aviation Technology 3.2 Flight Instruments The pitot-static system uses air pressure to work the flight instruments. A pitot tube …
Measure atmospheric pressure with a barometer and read the changes. Measuring humidity. Geography 2.1 Weather Atmospheric pressure is the weight of the air pressing on the Earth's surface. It is measured with a barometer…
Describe the pressure gradient force acting on air masses. Convection and breezes. Physics 4.1 Physics of wind formation The force that starts air moving is the pressure gradient force. It acts from high pressure towards…
Explain atmospheric pressure and why it varies. What wind is. Physics 4.1 Physics of wind formation Atmospheric pressure is caused by the weight of the air above a place. It falls as you go higher and it changes from pla…
The air has weight, it presses on everything, and the pressure is lower up a mountain than at the coast. Liquid pressure in all directions. Integrated Science 3.2 Pressure You live at the bottom of an ocean of air. That …
Explain the effect of pressure on equilibrium. Equilibrium and concentration. Chemistry 2.3 Reaction Rates Changing the pressure of a gaseous equilibrium shifts the position towards the side with fewer gas molecules when…
Integrated Science Pressure in solids Pressure in liquids Factors affecting pressure in solids and in liquids Experiments to demonstrate pressure in solids and liquids Applications of pressure in day to day life describe…
Relate the pressure and volume of a fixed mass of gas at steady temperature. Inverse variation and multiplication with decimals. Essential Mathematics 1.3 Variations For a fixed mass of gas at steady temperature, squeezi…
Why pressure grows with depth, and why the atmosphere presses on everything. The previous lesson - you should be able to use P = F / A. Physics 1.2 Pressure Solids press down. Liquids and gases press in every direction, …
Pressure as the weight of the air above you, why it falls with height, the altimeter, and cabin pressurisation. Atmospheric temperature. Aviation Technology 3.3 Aerodynamics of flight The second property is pressure. You…
…icator. Aviation Technology 3.2 Flight Instruments The altimeter shows the height of the aircraft above a set pressure level. The vertical speed indicator shows how fast the aircraft is climbing or descending. Both work …
A tour of the applications, from a jembe and a matatu tyre to a borehole pump and a pressure cooker, with the safety that belongs to each. Hydraulic pressure. Integrated Science 3.2 Pressure Every application in this sub…
Explain how pressure affects the rate. Catalysts and energy profiles. Chemistry 2.3 Reaction Rates Pressure matters mainly for reactions that involve gases. Raising the pressure squeezes the gas particles closer together…
… push on a small area into a large force on a large area. Dams, water towers and taps. Integrated Science 3.2 Pressure A mechanic at a garage lifts a matatu with one hand on a jack handle. The hand is not stronger than t…
The absolute pressure at depth is atmospheric pressure plus h rho g. Pressure at a point acts in all directions, and P = h rho g. Physics 1.2 Pressure The free surface of a dam or a cup of chai is not a vacuum. The atmos…
…air in motion. Air is a mixture of gases that has weight, so it presses on everything around it, and when the pressure is not the same everywhere the air moves and we feel wind. Our question: How is wind formed? The key …
The only two things that change pressure, and which way each one works. What pressure is. Integrated Science 3.2 Pressure Only two things decide the pressure. Not the material, not the colour, not the shape of the object…
Describe the process of wind formation. Atmospheric pressure. Physics 4.1 Physics of wind formation Wind is formed when the Sun heats the Earth unevenly. Some places become warmer than others, so their air rises and the …
The formula, its unit, and how to rearrange it to find a force or an area. Force, area and pressure. Integrated Science 3.2 Pressure The two rules can be written as one short formula. Once you have it, every pressure que…
Why solid rock folds instead of shattering, and the shapes it takes as pressure grows. Sub-strand 2.1 on rocks, particularly sedimentary layers. Geography 2.2 Folding Look at a road cutting through hilly country and you …
From Mombasa to Nairobi to Mount Kenya, the air column shortens and pressure falls. Fortin and aneroid barometers. Physics 1.2 Pressure A football pumped at the coast feels rock-hard in Mombasa and a little softer in Nai…
…nciple. Continuity calculations. Physics 1.1 Fluid flow Bernoulli principle links the speed of a fluid to its pressure. Where a fluid moves faster, its pressure is lower, and where it moves slower, its pressure is higher…
Sucrose loading raises pressure at the source; unloading lowers it at the sink - sap is pushed. Leaves that save water. Biology 2.2 Transport Xylem sap is pulled. Phloem sap is pushed. The push is a pressure difference c…
More particles in the same space means more collisions per second. Pressure does this for gases only. Collision theory, and that temperature changes both frequency and energy of collisions. General Science 3.5 Rates of R…
Explain how the pressure gradient, Coriolis and drag forces together shape the wind. Turbulent drag. Physics 4.1 Physics of wind formation Wind forms and blows because three forces act on the air. The pressure gradient f…
Atmospheric pressure as a weather element, highs and lows, and QNH so the altimeter is honest. Temperature and humidity. Aviation Technology 3.1 Aviation weather The fourth element is pressure - the weight of the air abo…
How a liquid presses on its container, and why the pressure is not the same everywhere. What pressure is. Integrated Science 3.2 Pressure A liquid presses on everything it touches. Not just downwards on the base, but out…
A small contact area turns an ordinary push into a cutting or piercing pressure. Finding force or area from P = F / A. Physics 1.2 Pressure A panga is sharpened on a stone in the compound. The cook does not push harder a…
Pressure testing before anything is covered up, and finding a leak when the gauge falls. Lessons 1 and 22. Building and Construction 4.3 Pipework Test before anything is covered up. A leak found now is a joint remade; a …
…reathing moves air into and out of the lungs. It works by changing the volume of the chest, which changes the pressure, so air flows in or out. Our question: Why is gaseous exchange significant in human beings? Inspirati…
…deep mark or a shallow one, depending on the area. Nothing beyond everyday experience. Integrated Science 3.2 Pressure Press a drawing pin into a board with your thumb and it goes in easily. Press your thumb into the sam…
…any everyday machines and activities. Diving, balloons and gas cylinders all depend on how gases behave under pressure and temperature. Our question: How do gases behave in different conditions? Diving, balloons and cyli…
…t process. The Contact process. Chemistry 2.3 Reaction Rates The Contact process also uses a compromise. High pressure would give more sulphur trioxide, but the reaction is fast enough at moderate pressure, so cost decid…
…irts further than cooking oil from the same depth, and why the shape of the container does not matter. Liquid pressure and depth. Integrated Science 3.2 Pressure Depth is not the only thing. Fill two identical bottles to…
An experiment with holes in a jerrycan showing that the deeper the hole, the greater the pressure. Pressure in liquids. Integrated Science 3.2 Pressure A yellow jerrycan with three small holes tells you the first rule of…
The elements of weather (wind, temperature, pressure, humidity, clouds, precipitation), how each affects an aircraft in flight, the main cloud types and their significance, how weather is measured, and why understanding …
Negative pressure to mock or hide home versus positive pressure to include, and how to name the pull before managing it. Emotion impact; self-esteem in diversity. Social Studies 3.5 Diversity and interpersonal skills The…
… hospital syringe and a rubber sucker all work because air outside pushes harder than air inside. Atmospheric pressure. Integrated Science 3.2 Pressure You do not suck a soda up a straw. You lower the air pressure inside…
…nding on the area it acts over. Nothing. You need only the idea that a force is a push or a pull. Physics 1.2 Pressure Press the flat end of a pencil into your palm. Now turn it round and press the sharp end with exactly…
….2 Gas Laws The gas laws help explain the weather and how engines work. Air expands, rises, cools and changes pressure, and burning fuel makes gases expand. Our question: How do gases behave in different conditions? Weat…