/edexcel/questions","basePath":"/gcse/physics/edexcel/density-and-states-of-matter/questions","formulaUrl":null,"initialIndex":40,"initialQuestionWindow":[{"id":"8d8c442b-47de-4ca3-8cbb-863fa9463820","revisionId":"dab9d62a-dda9-4545-981a-0586c650885a","questionNumber":null,"questionType":"LA","specification":"A student wants to measure the density of brass.\n\nThe student has:\n- a box of identical small brass rivets\n- a digital weighing balance\n- a measuring cylinder containing water","difficulty":5,"difficultyBand":"medium","totalMarks":4,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"01958274-0503-48df-9fb4-c14a93708e1d","label":null,"content":"Describe how the student could determine, as accurately as possible, the density of the brass used to make the rivets.","markscheme":"- Measures the mass of a large number of rivets (e.g. 10 to 20) together on the digital balance to reduce percentage uncertainty M1\n- Records the initial volume of water in the measuring cylinder, reading at eye level (to avoid parallax error) at the bottom of the meniscus M1\n- Lowers the same group of rivets gently into the water (to prevent splashing) and records the final volume, finding the volume of rivets by: $\\text{Volume} = \\text{final volume} - \\text{initial volume}$ M1\n- Calculates the density of the brass using: $\\text{density} = \\frac{\\text{mass}}{\\text{volume}}$ A1","marks":4,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"915f30bf-5b40-4a10-99cd-d5d02aaba704","revisionId":"29a4bf4d-b3d7-4429-9522-9f0da1580811","questionNumber":null,"questionType":"LA","specification":"","difficulty":4,"difficultyBand":"medium","totalMarks":3,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"a40fe91b-b378-495b-af8a-47b25ae6530b","label":null,"content":"A high-precision subsea pressure housing made from a specialized engineering polymer has a mass of $5.25 \\text{ kg}$.\n\nThe density, $\\rho$, of this polymer is $1420 \\text{ kg/m}^3$.\n\nCalculate the volume of the housing in $\\text{m}^3$.\n\nUse the equation:\n$$\\rho = \\frac{m}{V}$$\n\nGive your answer to $3$ significant figures.","markscheme":"- Rearranges the density equation to make volume the subject, $V = \\frac{m}{\\rho}$, or substitutes values directly into the equation: $1420 = \\frac{5.25}{V}$ M1\n- Substitutes the correct values into the rearranged equation: $V = \\frac{5.25}{1420}$ M1\n- Calculates the final value to $3$ significant figures with correct units: $0.00370 \\text{ m}^3$ (or $3.70 \\times 10^{-3} \\text{ m}^3$) A1","marks":3,"order":0,"markingRubric":null,"explanation":{"methods":[{"id":"rearrange_density","label":"Rearrange the density equation","steps":[{"type":"text","order":0,"title":"Identify the quantities","content":"Use the mass $m=5.25\\text{ kg}$ and density $\\rho=1420\\text{ kg/m}^3$. The required quantity is the volume $V$, in $\\text{m}^3$.","highlights":[{"text":"The density, $\\rho$, of this polymer is $1420 \\text{ kg/m}^3$.","location":"specification"},{"text":"Calculate the volume of the housing in $\\text{m}^3$.","location":"specification"}]},{"type":"hyper_latex","block":{"nodes":[{"latex":"\\rho = \\frac{m}{\\htmlData{anchor=volume-in-fraction}{V}}"},{"latex":"\\rho V = \\htmlData{anchor=mass-after-multiply}{m}"},{"latex":"\\htmlData{anchor=volume-subject}{V} = \\frac{m}{\\rho}"}],"highlights":[{"color":"green","style":"box","anchor":"volume-subject"}],"connections":[{"to":"mass-after-multiply","from":"volume-in-fraction","color":"sky","label":"multiply by V"},{"to":"volume-subject","from":"mass-after-multiply","color":"teal","label":"divide by rho"}]},"order":2,"title":"Make volume the subject","description":"Volume is beneath the fraction bar. Multiply both sides by volume, then divide by density. This rearrangement earns the first method mark."},{"type":"hyper_latex","block":{"nodes":[{"latex":"V = \\frac{m}{\\rho}"},{"latex":"V = \\f

Density and states of matter

Question 12

Density and states of matter Questions

Density and states of matter

Question 12

Density and states of matter Questions