a greater downward force per unit area earns the second mark.","highlights":[{"text":"Explain why the fluid pressure on the diver increases as they dive deeper.","location":"specification"}]}]}],"generatedAt":"2026-07-22T09:31:00.528Z","modelVersion":"gpt-5.6-terra+diagrams-1","explanationVersion":"v3"},"options":[]},{"id":"6107f3b3-8d86-449f-8237-dfbd2d2240a9","label":"b","content":"Calculate the increase in pressure on the diver. State the unit.","markscheme":"- Calculates the change in depth: $\\Delta h = 12.00 - 1.50 = 10.50\\text{ m}$ C1\n- Recalls or uses the pressure formula: $\\Delta p = \\rho g \\Delta h$ M1\n- Substitutes the values: $\\Delta p = 1000 \\times 9.8 \\times 10.50$ M1\n- Calculates the correct pressure change value: $102\\,900$ (or $103\\,000$) A1\n- States the correct unit of pressure: $\\text{Pa}$ or $\\text{N/m}^2$ (or $\\text{kPa}$) B1","marks":5,"order":1,"markingRubric":null,"explanation":{"methods":[{"id":"hydrostatic_pressure","label":"Calculate pressure increase","steps":[{"type":"drawing","order":0,"title":"See the depth change","width":394,"height":631,"shapes":[{"id":"surface","type":"line","color":"black","points":[{"x":42,"y":98.7},{"x":305.4,"y":98.7}]},{"id":"start-guide","dash":"dashed","type":"line","color":"grey","points":[{"x":123.1,"y":98.7},{"x":123.1,"y":159.5}]},{"id":"depth-connector","type":"line","color":"red","points":[{"x":70.4,"y":187.9},{"x":70.4,"y":556.7}]},{"id":"depth-arrow-top","toX":70.4,"toY":159.5,"type":"arrow","color":"red","fromX":70.4,"fromY":187.9},{"id":"depth-arrow-bottom","toX":70.4,"toY":585.1,"type":"arrow","color":"red","fromX":70.4,"fromY":556.7},{"h":8,"w":8,"x":119.1,"y":155.5,"id":"start-point","geo":"ellipse","fill":"none","type":"geo","color":"red"},{"h":8,"w":8,"x":119.1,"y":581.1,"id":"finish-point","geo":"ellipse","fill":"none","type":"geo","color":"red"},{"x":89.6,"y":174.5,"id":"start-point-label","text":"Start","type":"text","color":"red"},{"x":123.1,"y":530.9,"id":"finish-point-label","text":"Finish","type":"text","color":"red"},{"x":94.2,"y":42,"id":"surface-label","text":"lake surface","type":"text"},{"x":106.3,"y":211.3,"id":"start-label","text":"diver at 1.50 m","type":"text","color":"red"},{"x":122.7,"y":500.2,"id":"finish-label","size":"s","text":"diver at 12.00 m","type":"text","color":"red"},{"x":79.6,"y":355.8,"id":"depth-label","text":"increase in depth, Δh","type":"text","color":"red"}],"caption":"The diver moves from the shallower marked position to the deeper marked position. The red dimension arrow shows the increase in depth, $\\Delta h$.","diagramSpec":{"grid":{"xMax":7,"xMin":-2.5,"yMax":1.2,"yMin":-13,"showAxes":false,"showGrid":false},"units":"m","points":[{"at":[-2,0],"name":"Sleft"},{"at":[4.5,0],"name":"Sright"},{"at":[0,-1.5],"name":"Start"},{"at":[0,-12],"name":"Finish"},{"at":[0,0],"name":"GuideTop"},{"at":[-1.3,-1.5],"name":"DimTop"},{"at":[-1.3,-2.2],"name":"DimJoinTop"},{"at":[-1.3,-11.3],"name":"DimJoinBottom"},{"at":[-1.3,-12],"name":"DimBottom"}],"elements":[{"id":"surface","to":"Sright","from":"Sleft","kind":"segment","color":"black"},{"id":"start-guide","to":"Start","dash":"dashed","from":"GuideTop","kind":"segment","color":"grey"},{"id":"depth-connector","to":"DimJoinBottom","from":"DimJoinTop","kind":"segment","color":"red"},{"id":"depth-arrow-top","to":"DimTop","from":"DimJoinTop","kind":"segment","color":"red","arrows":"end"},{"id":"depth-arrow-bottom","to":"DimBottom","from":"DimJoinBottom","kind":"segment","color":"red","arrows":"end"},{"at":"Start","id":"start-point","kind":"point","color":"red","style":"open"},{"at":"Finish","id":"finish-point","kind":"point","color":"red","style":"open"},{"at":[1.25,0.45],"id":"surface-label","kind":"label","size":"m","text":"lake surface"},{"at":[2,-2.1],"id":"start-label","kind":"label","size":"m","text":"diver at 1.50 m","color":"red"},{"at":[2,-11.3],"id":"finish-label","kind":"label","size":"m","text":"diver at 12.00 m","color":"red"},{"at":[1.6,-6.75],"id":"depth-label","kind":"la

Pressure and pressure differences in fluids (physics only)

Question 15

Pressure and pressure differences in fluids (physics only) Questions

Pressure and pressure differences in fluids (physics only)

Question 15

Pressure and pressure differences in fluids (physics only) Questions