// Numbas version: exam_results_page_options
{"name": "Keeping track of units (dimensional analysis) 2", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "Keeping track of units (dimensional analysis) 2", "tags": [], "metadata": {"description": "Nursing question. Determine the units of an answer given the units and operations used.", "licence": "Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International"}, "statement": "<p>Evaluate the following&nbsp;without using a calculator.</p>\n<p>If you are unsure of how to do&nbsp;a question, click on&nbsp;<i>Reveal answers</i>&nbsp;to see the full working. Then, once you understand how to do the question, click on&nbsp;<em>Try another question like this one</em>&nbsp;to start again.</p>", "advice": "<p>In our situation</p>\n<p><span data-jme-visible=\"seed=0\">\\[\\frac{\\var{units[0]}}{\\var{units[0]}}\\times \\frac{\\var{units[1]}}{1}\\]</span> <span data-jme-visible=\"seed=1\">\\[\\frac{\\var{units[0]}\\times\\var{units[1]}}{\\var{units[0]}}\\]</span>&nbsp;</p>\n<p>the {units[0]} 'cancel', leaving $\\var{units[1]}$.</p>\n<p>So why do&nbsp;the&nbsp;{units[0]} cancel? Well, on the top of the fraction we have a '{units[0]}'&nbsp; but we also have a '{units[0]}' on the bottom, and if you divide something by itself you get $1$, which doesn't affect the units.</p>", "rulesets": {}, "extensions": [], "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"seed": {"name": "seed", "group": "Ungrouped variables", "definition": "random(0,1)", "description": "", "templateType": "anything", "can_override": false}, "units": {"name": "units", "group": "Ungrouped variables", "definition": "shuffle(fulllist)[0..2]", "description": "", "templateType": "anything", "can_override": false}, "fulllist": {"name": "fulllist", "group": "Ungrouped variables", "definition": "['mL','mg','hr','drops','min','kg','mcg','units']", "description": "", "templateType": "anything", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["fulllist", "units", "seed"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "gapfill", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "<p>Suppose&nbsp;you calculate something using the following units and operations.</p>\n<p><span data-jme-visible=\"seed=0\">\\[\\frac{\\var{units[0]}}{\\var{units[0]}}\\times \\frac{\\var{units[1]}}{1}\\]</span> <span data-jme-visible=\"seed=1\">\\[\\frac{\\var{units[0]}\\times\\var{units[1]}}{\\var{units[0]}}\\]</span>&nbsp;</p>\n<p>What units would the final answer have?</p>\n<p></p>\n<p>[[0]] (type your answer without spaces)</p>", "gaps": [{"type": "patternmatch", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "answer": "{units[1]}", "displayAnswer": "{units[1]}", "matchMode": "regex"}], "sortAnswers": false}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always", "contributors": [{"name": "Ben Brawn", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/605/"}]}]}], "contributors": [{"name": "Ben Brawn", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/605/"}]}