Cheating is a serious offense and anyone caught copying from their neighbor or f
ID: 495515 • Letter: C
Question
Cheating is a serious offense and anyone caught copying from their neighbor or from any sort of cheat sheet will receive a grade of ZERO for the this quiz and be reported to the College Disciplinary board. Your friend Benjamin measures the length of 3 glass boiling tubes using a 30 cm measuring stick. Based on the data shown below determine the average deviation for Ben's length measurements. Imagine that you are asked to determine the density of a copper penny. You walk into the lab and on the front bench you find a 50 mL graduated cylinder, an electronic balance and a stack of 20 copper pennies. Thinking that this is going to be very easy you take a penny and measure its mass. You find that the penny has a mass of 2.51 g, You then set out to find the volume of the penny using the water displacement method. You fill the graduated cylinder with 20 mL of water, put the penny into the graduated cylinder and find that the penny displaces no discernible amount of water. What could you do to find the volume of a single penny?Explanation / Answer
Mean of the sample of data points = (10.45+10.52+10.48)/3= 10.48333
mod of (10.45-10.48333) =0.03333, modulus of 10.52-10.48333=0.036667 and modulus of 10.48-10.48333=0.00333
Hence average of the difference =( 0.0333+0.036667+0.00333)/3 =0.024444
this is the average deviation
2. Instead of taking single copper penny he can take three to four copper pennies and find the average mass of those four samples. Also he can find the volume rise of all the four sample and take the volume rise of single penny from the average volume rise.
average mass of single penny = sum of masses of the no of penniies/ no of pennies
average volume =volume rise of no of the pennnies/ no of pennies
density =average mass/average volume