CH 2 HW PART 1.pdf

# CH 2 HW PART 1.pdf - CH 2 HW PART 1 Due 11:59pm on Sunday...

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CH 2 HW PART 1 Due: 11:59pm on Sunday, September 10, 2017 To understand how points are awarded, read the Grading Policy for this assignment. Chapter 2 Reading Quiz Question 1 Part A The most important component when reporting a numerical scientific result is the ______. Hint 1. Measurements Reporting a temperature increase of 0.6 would be unclear unless another piece of information is also included. ANSWER: Correct Exercise 2.1 Part A Why is it necessary to include units when reporting scientific measurements? ANSWER: Correct Chapter 2 Reading Quiz Question 2 Part A A measurement of 1 × 10 –3 meters represents ______. Hint 1. Representing values using scientific notation A negative exponent of 10 represents a fraction. ANSWER: number of digits decimal point unit ± symbol Units must be included with a number so that there is no doubt as to the meaning of the number. Units must be included with the number to make measurements more complicated. It is very simple to report them without units. Units must be included with the number to compare results of various measurements. None of the above.

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Correct Exercise 2.3 Part A Why is scientific notation useful? Drag the appropriate labels to their respective targets. Note: not all labels will be used. ANSWER: Correct Exercise 2.2 Part A Why are the number of digits reported in scientific measurements important? Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer. ANSWER: 10 meters 0.001 meters 1000 meters 0.1 meters Help Reset draw attention easier understand write harder remember
Correct Chapter 2 Reading Quiz Question 3 Part A When a scientific number is the result of a measurement using equipment such as a balance, the last digit is ______. Hint 1. Expressing error in a measurement All digits in a measurement are certain except one. ANSWER: Correct Chapter 2 Reading Quiz Question 4 Part A Which of the following is disregarded when counting significant figures? Hint 1. Counting significant figures Some digits are important because removing them would change the value of the number. However, these digits are not considered significant because they do not show the uncertainty of the measurement. ANSWER: Help Reset minus less bad 1. The more precisely a number is known, the more digits you can use. 2. The number of digits reflects how well you know a value or, in other words, how precisely the value is known. 3. All digits that are certain, plus one digit that contains some uncertainty, are reported. certain exact deleted estimated

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Correct Exercise 2.5 Part A When do zeros count as significant digits and when they do not? Match the words in the left-hand column to the appropriate blanks in the sentences on the right. Make certain each sentence is completed before submitting your answer.
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