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PHY171-CH1-Introduction-Misconseptual Questions Flashcards | StudBud

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How many significant figures are in the number 0.0087

What is the result, taking significant figures into account? (3.84 s)(37 m/s)+(5.3 s)(14.1 m/s)=

PHY171-CH1-Introduction-Misconseptual Questions

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Answers

1
What is the result, taking significant figures into account? (3.84 s)(37 m/s)+(5.3 s)(14.1 m/s)=
220m
217m
210m
216.81m
2
How many significant figures are in the number 0.0087
1
3
2
4
3
How many significant figures does the result of 1.362+25.2 have?
3
2
4
5
4
To convert ft to yd, if you multiply by 1/3, what should you do to convert ft² to yd²?
Multiply by 1/6
Multiply by 1/3
Multiply by 1/9
Multiply by 9
5
What does accuracy represent?
Repeatability of a measurment with a given insturment
An deal number of measurements to take
How poorly an insturment is operating
How close a measurement is to the true value
6
L² represents the dimensions for which of the following?
cm2
square feet
m2
All of the above
7
What does precision represent?
How close a measurement is to the true value
Repeatability of a measurment with a given instrument
An deal number of measurements to take
How poorly an insturment is operating
8
What is not true about an order of magntude estimation?
It gives you a rough idea of the answer
It can be done by keeping only one significant figure
It can be used to check if an exact calculation is reasonable
It will always be accurate to at least two significant figures
9
Four different insturments are used to measure the same pencil. Which measurement implies the most precision?
16.0cm
0.160m
0.00016km
160.0mm
10
The laws of physics
Are accepted by all countries, and cannot be changed without treaties
Are a part of nature waiting to be discovered
Applies to physics, but not necessarily chemistry or other fields
Are permanent and unalterable