Open Question
Four astronauts are in a spherical space station. (a) If, as is typical, each of them breathes about 500 cm3 of air with each breath, approximately what volume of air (in cubic meters) do these astronauts breathe in a year?
1. Intro to Physics Units
Counting Significant Figures
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How many significant figures are in the value 60.780?
A
1
B
2
C
3
D
4
E
6
F
5
Verified step by step guidance1
Understand the concept of significant figures: Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and any trailing zeros in the decimal portion.
Identify non-zero digits: In the number 60.780, the digits '6', '7', and '8' are non-zero and are always considered significant.
Consider zeros between significant digits: The zero between '6' and '7' is significant because it is between two non-zero digits.
Evaluate trailing zeros in the decimal portion: The zero after '8' is significant because it is a trailing zero in the decimal portion, indicating precision.
Count all significant figures: Combine all identified significant digits ('6', '0', '7', '8', '0') to determine the total number of significant figures, which is 5.
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