{"content":{"sharePage":{"page":0,"digests":[{"id":"28049851","dateCreated":"1286368230","smartDate":"Oct 6, 2010","userCreated":{"username":"DennisCarbone","url":"https:\/\/www.wikispaces.com\/user\/view\/DennisCarbone","imageUrl":"https:\/\/www.wikispaces.com\/user\/pic\/1250792475\/DennisCarbone-lg.jpg"},"monitored":false,"locked":false,"links":{"self":"https:\/\/dcarbone.wikispaces.com\/share\/view\/28049851"},"dateDigested":1532390669,"startDate":null,"sharedType":"discussion","title":"Density Critical Thinking","description":"In class, we have talked about how the densities of different materials will effect whether or not they can sink or float in liquids. For example, ice floats in water, because ice has a lower density than water. A lead sinker will sink in water because it has a higher density than water.
\n
\nYour first task is the answer the first two questions:
\n
\n1) What is the density equation?
\n2) What is the density of water?
\n
\nYour last task is to read the following word problem and use your powers of critical thinking and your answers to the above questions to answer the problem.
\n
\n3) A little aluminum boat with a mass of 14.5g has a volume of 450 cubic centimeters. The little boat is carefully placed in a pool of water. It floats! If we begin adding pennies that are 2.5g each, how many pennies can we add before the boat sinks?
\n
\nHint- each penny you add increases the boat's density. How many pennies do you have to add to increase the boat's density so much that it sinks?","replyPages":[{"page":0,"digests":[{"id":"28053189","body":"1. d=m\/v
\nd=density
\nm=mass
\nv=volume
\n
\n2. p=m\/v","dateCreated":"1286372766","smartDate":"Oct 6, 2010","userCreated":{"username":"rekee.mayu","url":"https:\/\/www.wikispaces.com\/user\/view\/rekee.mayu","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}},{"id":"28053297","body":"3. 0.03g\/cm3","dateCreated":"1286372907","smartDate":"Oct 6, 2010","userCreated":{"username":"rekee.mayu","url":"https:\/\/www.wikispaces.com\/user\/view\/rekee.mayu","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}},{"id":"28053737","body":"the density equation is d equals mass over volume
\nthe density of water is equal to 1 gram or 1 millimeter","dateCreated":"1286373289","smartDate":"Oct 6, 2010","userCreated":{"username":"myesha.martin","url":"https:\/\/www.wikispaces.com\/user\/view\/myesha.martin","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}},{"id":"28053745","body":" m
\np=--
\n v
\n
\n
\nm= is the mass
\n
\n,
\nV=is the volume.
\n
\n
\n
\n3.","dateCreated":"1286373294","smartDate":"Oct 6, 2010","userCreated":{"username":"austin.hubbell1","url":"https:\/\/www.wikispaces.com\/user\/view\/austin.hubbell1","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}},{"id":"28053753","body":"the density of water =1g per milliliter
\nthe density equation is mass over volume","dateCreated":"1286373298","smartDate":"Oct 6, 2010","userCreated":{"username":"mary.allen1","url":"https:\/\/www.wikispaces.com\/user\/view\/mary.allen1","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}},{"id":"28053827","body":"the density equation is density = mass over volume
\nthe density of water is =to 1 gram or 1 milimeter
\ni think it will take ten pennies to sink it!!!!","dateCreated":"1286373346","smartDate":"Oct 6, 2010","userCreated":{"username":"jewell.payne","url":"https:\/\/www.wikispaces.com\/user\/view\/jewell.payne","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}},{"id":"28053839","body":"1 mass divided by volume
\n2 the density of water is 1 gram per milaleater
\n3 0.32","dateCreated":"1286373366","smartDate":"Oct 6, 2010","userCreated":{"username":"donovan.vanhouten1","url":"https:\/\/www.wikispaces.com\/user\/view\/donovan.vanhouten1","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}},{"id":"28053845","body":"1. The density equation is mass divided by volume
\n
\n2. The density of water is .999g\/mL when freezing and .998g\/mL at room temp.","dateCreated":"1286373372","smartDate":"Oct 6, 2010","userCreated":{"username":"thomas.phillips1","url":"https:\/\/www.wikispaces.com\/user\/view\/thomas.phillips1","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}},{"id":"28087541","body":"3. I think it will take 0.032gvof pennies to sink the boat.","dateCreated":"1286403347","smartDate":"Oct 6, 2010","userCreated":{"username":"thomas.phillips1","url":"https:\/\/www.wikispaces.com\/user\/view\/thomas.phillips1","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}},{"id":"28095645","body":"1) mass\/volume=density
\n
\n2) one gram per millileter!
\n
\n3) 0.32?","dateCreated":"1286411355","smartDate":"Oct 6, 2010","userCreated":{"username":"cassandra.sidle","url":"https:\/\/www.wikispaces.com\/user\/view\/cassandra.sidle","imageUrl":"https:\/\/ssl.wikicdn.com\/i\/user_none_lg.jpg"}},{"id":"28363141","body":" 1. D = M\/V ( Mass divided by volume is the
\n density )
\n
\n 2. 1g per mL or cm3 ( 1 Gram per Milli Liter
\n or cubic centimeter )
\n
\n 3. I think the boat sinks if you put in more
\n than 174 pennies.
\n
\n Elias","dateCreated":"1286927596","smartDate":"Oct 12, 2010","userCreated":{"username":"reksen.elias1","url":"https:\/\/www.wikispaces.com\/user\/view\/reksen.elias1","imageUrl":"https:\/\/www.wikispaces.com\/user\/pic\/1286377843\/reksen.elias1-lg.jpg"}},{"id":"28490861","body":"*Cubic centimeter is for measuring solid things","dateCreated":"1287088651","smartDate":"Oct 14, 2010","userCreated":{"username":"reksen.elias1","url":"https:\/\/www.wikispaces.com\/user\/view\/reksen.elias1","imageUrl":"https:\/\/www.wikispaces.com\/user\/pic\/1286377843\/reksen.elias1-lg.jpg"}}],"more":1}]}],"more":false},"comments":[]},"http":{"code":200,"status":"OK"},"redirectUrl":null,"javascript":null,"notices":{"warning":[],"error":[],"info":[],"success":[]}}