Science
posted by Anonymous .
A student measures a rectangular room to be 20.0 m X 17.16 m. Which of the numbers below represents the room’s area with the correct number of significant figures?
a. 340 m^2
b. 343 m^2
c. 343.2 m^2
d. 343.20 m^2
B
Which component of the technological system is activated when an automobile airbag inflates?
a. input
b. feedback
c. process
d. output
B
How can surveying reading material help your comprehension?
a. Knowing the main ideas ahead of time helps you know where to focus your attention.
b. Reciting the answers to your questions out loud will help you remember them.
c. Reading ahead makes studying go faster.
d. Surveying ahead of time means you can skip maps, diagrams, and content summaries later.
A
A student measures the mass of a paper clip. The student’s data table is shown below. The accepted value for the paper clip’s mass is 1.14 g.
Trial 1, 2.45 g
Trial 2, 2.40 g
Trial 3, 2.42 g
Which of the following describes the student’s measurements?
a. The student’s measurements were accurate, but not precise.
b. The student’s measurements were precise, but not accurate.
c. The student’s measurements were neither precise nor accurate.
d. The student’s measurements were both precise and accurate.
B

Science 
PsyDAG
Did you multiply 20 * 17.16? What did you get? Not B.
Feedback gives you information that your actions were (or were not) successful. Not B.
Agree with A.
With something as small as a paper clip, do you think a .05 gram variance is accurate? 
Science 
Anonymous
1. I need to have 3 sig fig, right?
2. D?
4. I think it is b because the student's measurements are all close to each other, but not accurate because it is not close to the "accepted" value, 1.14 g.
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