Exam1_solution

# Exam1_solution - Physical Science 303 Name Exam#1 Oct.4 2007 Total 8 problems for 100 full score 1 To measure the weight of an unknown object we

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Physical Science 303 Exam #1 , Oct.4 2007 Name : Total 8 problems for 100 full score. 1. To measure the weight of an unknown object, we use a spring balance. The following results were obtained when the process was repeated several times. Fill the blanks below the table. (14pt) Data ( N ) Deviation 16.3 -0.26 16.8 0.24 16.4 -0.16 16.6 0.04 16.7 0.14 Total 82.80 0.84 Average 16.56 0.168 Uncertainty 0.2 Result 16.6 ± 0.2 N Relative Uncertainty 1 % 2. Write down significant figure and scientific notation. (6 pts) significant figures scientific notation 0.0000002030 (2 pts) 4 2.030 X 10 -7 00053.8 (2 pts) 3 5.38 X 10 14.70 × 13.2 (2 pts) 3 1.94 X 10 2 3. Answer following questions (10pts) a) 0.1 ml is equal to ___ 0.1 __ cm 3 = ___ 10 -7 ______ m 3 . (5pts) b) A graduated cylinder contains 15.0 ml of water. An irregularly shaped object is placed in the cylinder and the water level rises to the 29.8 ml mark. If the object has a mass of 35.2 g, what is its density in g/cm 3 (5pts) Density = mass/volume = 35.2g/(29.8-15.0 ml) = 2.38 g/cm

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## This note was uploaded on 04/29/2008 for the course PS 303 taught by Professor Modi during the Spring '08 term at University of Texas at Austin.

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Exam1_solution - Physical Science 303 Name Exam#1 Oct.4 2007 Total 8 problems for 100 full score 1 To measure the weight of an unknown object we

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