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Knewton's Chapter 2 test- with Questions with 100% Correct Answers
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Knewton's Chapter 2 test- with Questions with 100% Correct Answers
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Knewton's Chapter 2 test- withQuestions with 100% Correct Answers
A light-year is a measure of distance rather than time; it is the distance that a ray of
light will travel in a year in a vacuum. The distance between the earth and the sun is
approximately 0.0000158 light-years. Write this number in scientific notation. - Answer
1.58 x 10-5 light-years
Scientific notation is used to express very large and very small numbers using. - Answer
powers of 10
Non-zero digits are: - Answer always significant
When dealing with significant figures, the rules for adding values are the same as
the rules for: - Answer subtracting values
One of the basic rules for significant figures is: - Answer All zeroes between
significant digits are significant.
Complete the following operation to the correct number of significant figures: 4.5 x
11.41 = - Answer 51
Which of the following must be true about a precise measurement? - Answer It typically
contains many significant figures.
, How many significant figures does the number, 2098.00703 ontain? - Answer 9
Solve the following problem and report answers with appropriate number of
significant digits: 1.31 cm x 2.3 cm = - Answer 3.0 cm
The number of significant figures in a value is a display of the of a measurement. -
Answer precision
The number 35.000 has how many significant figures? - Answer significant figures = 5
Explain when trailing zeros should be considered significant. - Answer When the number
includes a decimal point.
0.738 x 0.28 is 0.20664 but is rounded to 0.21. Which rule or rules are applied to this
calculation? - Answer Round the result to the same number of significant figures as the
value with the least number of significant figures. V Round up if the digit to be
dropped is 5 or greater.
When adding numbers, the sum will have: - Answer as many decimal places as the
number with fewest decimal places
What is the Sl unit used to measure temperature? - Answer Kelvin
What is the Sl unit used to measure temperature? - Answer Kelvin
Question Which of the following is NOT a SI base unit? - Answer oz
Which is the shortest length of time? - Answer answer: one nanosecond
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