Monday
December 22, 2014

Homework Help: Science- Ms. Sue or DrBob222?

Posted by Anonymous on Wednesday, October 2, 2013 at 3:48pm.

A student measures a rectangular room to be 20.0 m X 17.16 m. Which of the numbers below represents the roomís 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

D

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 studentís data table is shown below. The accepted value for the paper clipís 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 studentís measurements?
a. The studentís measurements were accurate, but not precise.
b. The studentís measurements were precise, but not accurate.
c. The studentís measurements were neither precise nor accurate.
d. The studentís measurements were both precise and accurate.

B

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