Problem Solving – Ch. 4 Dimensional Analysis - Success 24/7



1617181920Zango Lab (Inquiry)Due at the end of the periodCh. 4 Notes through writing conversion factorsHW: DA Part 1 WSFinish Ch. 4 NotesCalculate speed of cars or balls or slinkies in miles/hour HW: DA Part 2 WSRETEST DEADLINE!DA Challenge“In groups”Complete DA Challenge and Quiz on DAIntro: History Projects on the History of the Atom2324Chapter 4 – Dimensional AnalysisNotes and BellworkChapter 4 ReviewChapter 4 Test BellworkProblem Solving – Ch. 4 Dimensional Analysis3 step Problem Solving ApproachExample:What is the mass, in grams, of a piece of lead that has a volume of 19.84 cm3?Solve these problems:Simple Conversion ProblemsHow many inches are there in 4 ft?The conversion factors between meters and millimeters are:ExamplesMulti-step Problems:Examples:Some problems require the conversion of two units. ____________ – determine how you will find the __________________________ – perform the _______________, this may involve measurements_____________ – does the answer make ________, and did you use correct ________ and significant _____________Analyze: list the ___________ and the ______________.Volume = ______________Density = _______/________Density = _______________Mass = ________________Calculate: solve for the ____________.D = so…m = _______________Mass = Evaluate: does the result make sense?7.823 x 15.76 = 892 + 173 + 56 = What is the mass, in grams of a piece of lead that has a volume of 8.73 cm3?V =m = D = What is the volume, in cm3, of a sample of cough syrup that has a mass of 20.0g and a density of 11.4 g/cm3?m =D = V = Dimensional AnalysisTo convert from one unit to another, we will use a problem solving method called ____________ __________. This method uses equalities or _________________ to change one unit into another. _________________What did you have to know in order to figure that out? 1 ft = 12 inches is a _______________. It can be written as a fraction where the numerator and the denominator are equivalent but have __________________. For example, we can use the following conversion factors for changing between inches and feet:70 kg = ____ g63 cm = ____ mm2.5 L = _____mL1 m2 = ____cm2How many atoms are in 7.00g of gold? (1 atom of gold = 3.271 x 10-22 g)Some dimensional analysis problems require several stepsHow many seconds are in 5.0 days?251904512573000343344512573000160464512573000_______________________________________How many students are in a 10 room building if each classroom contains 25 students?An example of this would be the conversion of speed in ____________________ to ______________________.An object was traveling at 400. m/min. What was its speed in cm/s?149034544450009188454445000__________________________= Convert 423 m/sec to km/min. The density of manganese is 7.21 g/cm3. What is the density of manganese expressed in units of kg/m3? ................
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