Physics Lab Report Cooling Coffee Essay

IntroductionIt is Saturday afterwardsnoon. You brew yourself a cup of java and are just ab break through to spill over cold take out into the coffee. The doorbell rings and you realize immediately that your friend needs your help for a few secondutes this afternoon. If you want to have your coffee as warm as possible after you helped your friend, what would be wise to do? Should you pour the milk now, or after you come back? Or does it make no difference?I would like to add the milk into coffee after I come back. Because the earnest coffee without milk will imperturbable longer than the warm coffee with milk. identifyTo find out the relationship between the time at which the milk is added, and the final temperature of the coffee/milk mixture.Every minute the coffee was getting cooler (milk was getting warmer until the room temperature), but when we added the milk into coffee it started to cool more faster.VariablesIndependentDependent the coffee/ milk temperature dependents o f the room temperature.Controlled To control variables we female genitals change hot coffee/ peeing and milk every minute, or put hot coffee/ water into thermos and milk into object that has same temperature.HypothesisMy hypothesis is that will be better if we wont add milk into coffee( because it has a cooling effect), so the coffee will be hoter if we wont add milk into it. Apparatus1. 250 ml beaker2. 50 ml beaker3. 100 ml4. 50 ml measuring cylinder5. thermometer6. kettle7. water cooler8. stop watch9. move rodThermometerDiagramThermometerHot Coffee (200 ml)Cold Milk (50 ml) mode acting1) Take 2 runnel tubes2) In the first test tube pour milk3) In the second one pour hot coffee/hot water.4) Put thermometers into both test tube.5) Measure the temperature every minute.6) Record the temperature. info CollectionAt the beginning of the experiment the temperature of the coffee/ hot water was 80.9, but the water started to cool and every minute the temperature wasgetting lower. 80.9 7 9.9 73.7 71.7 65.3The milk was 19.8 and with every minute it was getting warmer. 19.8 19.9 20.1 20.1 20.1So the milk and hot coffee had difference of 61.1 but after mixed unneurotic-54.5.Substance Temperature(c)as is Temperature(c)after 1 min Temperature(c)after 2 min Temperature(c)After 3 min Temperature(c)After 4 min milk 19.8 19.9 20.1 20.1 20.1Hot water 80.9 79.9 73.7 71.7 65.3both mixed together 53.1 52.1 51.0 51.0 50.3GraphConclusion and EvaluationProblemsWe use lone nigh(prenominal) one metal rod, after hot water we put it into milk ( the rod was hot) and maybe it made a effect to results. Also we use only one thermometer in short time, after hot coffee we measured the temperature of the milk promptly, maybe this female genitalia changed results. To solve these problems we should use two metal rods and two thermometers. Make sure you read and follow the checklist send offDesign virtuoso(a) /2 Partial / 1 not at every /0 purview 1 Define problem and select variables Form ulates a question question and identifies the relevant variables. Formulates a inquiry question that is incomplete or identifies only some relevant variables. Does not identify a research question AND does not identify any relevant variables. gull ChecklistResearch Question (RQ) or excogitation clearly stated RQ/Aim includes Independent Variable (IV)and Dependent Variable (DV) IV correctly determine with units/ range DV correctly identified with units presage is quantitative A sketch graph is included, with definition Prediction is explained using scientific theory Design Complete /2 Partial / 1 Not at solely /0Aspect 2 Controlling variables Designs a system for the effective control of the variables.. Designs a method that makes some attempt to control the variables. Designs a method that does not control the variables.Marking ChecklistMethod to manipulate IV, including specific details of range or increments Method for recording results, including units Diagram of equip ment or selective information-based set-up Controlled variables presented as a table * List exclusively variables to be controlledFor each variable How could it impact the results? only how will it be controlled? Design Complete /2 Partial / 1 Not at all /0Aspect 3 Developing a method for the collection of information Develops a method that allows for the collection of sufficient, relevant info Develops a method that allows for the collection of insufficient, relevant data Develops a method that does not allow for any relevant data to be collectedMarking ChecklistHow will your results be presented? Does your plan address the research question? Do you have a minimum of 5 antithetic values for the independent variable? Do you have sufficient repeats at each value to ensure reliability? Is your method clearly presented and can it be easily followed by others? pay off you addressed natural rubber? Data Collection and ProcessingDCP Complete /2 Partial / 1 Not at all /0Aspect 1 Recording primitive data Records appropriate data including units. Records appropriate data but with some mistakes or omissions. Does not record any appropriate raw data OR raw data is incomprehensible. Marking ChecklistRaw data clearly distinguished from neat data (possibly shed light on table) Units of IV and DV present and correct All data are save correctly and honestly quantitative points consistent throughout Decimal points consistent with precision of the measuring equipment DCP Complete /2 Partial / 1 Not at all /0Aspect 2 Processing raw data Processes the raw data correctly. Processes raw data, but with some mistakes and/ or omissions. No processing of raw data is carried out OR major mistakes are made in processing.Marking ChecklistCalculations to determine DV carried out, if necessary Calculations address RQ mathematics correctly applied Worked example calculations given Processed data (and decimal places) consistent with precision of recorded data Data Coll ection and Processing Complete /2 Partial / 1 Not at all /0Aspect 3 Presenting processed data Presents processed data appropriately Presents processed data appropriately but with some mistakes or omissions Presents processed data inappropriately or incomprehensiblyMarking ChecklistDoes your graph have an informative title? Is it an appropriate size with suitable scales? Are the axes labeled with S.I./metric units? Are all the points accurately plotted? Does it have a suitable line of best tick off? Conclusion and evaluationCE Complete /2 Partial / 1 Not at all /0Aspect 1 Concluding States a conclusion, with justification, based on a reasonable rendition of the data States a conclusion based on a reasonable interpretation of the data States no conclusion or the conclusion is based on an unreasonable interpretation of the dataMarking ChecklistHave you stated the patterns or trends in your data with reference to your graph? Have you offered a scientific explanation of your results? Comparisons, if appropriate, are made Data related to prediction or RQ to what extent to they agree/ disagree? take over language used Supports my prediction (not proves or is correct) Suggestions for further investigation stated CE Complete /2 Partial / 1 Not at all /0Aspect 2 Evaluating procedures Evaluates weaknesses and limitations. Identifies some weaknesses and limitations, but the evaluation is weak or missing. Identifies irrelevant weaknesses and limitations.Marking ChecklistAnalysis of reliability of results Are data sufficient to address the RQ? Was the range of the IV appropriate? Identify & Explain anomalous data points come to to data Some attempt to evaluate measurement/ instrument errors, systematic error problems with the method) in toll of Possible effect on data The validity of the conclusion Time management or valet error may be mentioned, though these are not scientific errors they should be eliminated with good hardheaded skills. The focus here should be on the investigation. List your errors and limitations in order state the most world-shaking error or limitation firstCE Complete /2 Partial / 1 Not at all /0Aspect 3 Improving the investigation Suggests realistic improvements in obligingness of identified weaknesses and limitations. Suggests only superficial improvements. Suggests unrealistic improvements.Marking ChecklistFor each weakness or limitation mentioned above, how could change experimental design remove or reduce the effect of the error in terms of Techniques used to collect and record data Design of the investigation, including range of values chosen and repeats of each IV data point Realistic, specific and achievable improvements