Q1: Practice in density calculations. Some pranksters managed to get a hold of s
ID: 838481 • Letter: Q
Question
Q1: Practice in density calculations. Some pranksters managed to get a hold of some ethylene glycol, adipic acid and aromatic diisocyanate and filled a U-Haul van full of polyurethane foam. A U-Haul van has a volume of 236 cubic feet. If polyurethane foam has a density of 35.00 kg/m3 how much does the foam weigh in pounds?
Q2: The accepted value for the density of a certain liquid is 1.03 g/mL. A student obtains an average density of 0.9 g/mL. What is the relative percent error in the student's value. DO NOT include the percent sign in your answer. Express your answer to two decimal places.
Q3: A cylinder of length 5.58 in and radius 2.2 cm has a mass of 2.82 pounds. What is the density of the material in grams per cubic centimeter?
Q4: A rectangle of length 6.39 in., height 3.72 cm, and depth 271 mm has a mass of 172.2 ounces. What is the density of the material in grams per centimeters?
Q5: Consider the following set of measurements made by a student for an object with an accepted mass of 10.10 g
10.11 g
10.08 g
10.12 g
10.09 g
Answer
These measurements are accurate
These measurements are precise
These measurements are precise but inaccurate
These measurements are accurate but imprecise
Both A and B are true
A.These measurements are accurate
B.These measurements are precise
C.These measurements are precise but inaccurate
D.These measurements are accurate but imprecise
E.Both A and B are true
Explanation / Answer
1. 6.68278*35 Kg = 515.65 pounds
2. 12.62
3. 1279.13/(215.507) = 5.935 gm/cc
4. 2.983 gm/cc
5. Both A and B are true (high accuracy high precision)
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.