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Author Question: A ball dropped from the top of a building hits the ground 9.0 s later. How high is the building (in ... (Read 169 times)

silviawilliams41

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on: Jul 28, 2018
A ball dropped from the top of a building hits the ground 9.0 s later. How high is the building (in meters)?

Question 2

How many atoms are in 1.00 mol of Mg?
 a. 24.3
  b. 6.02  1023
  c. 24.3  6.02  1023
  d. 24.3  1023


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brittrenee

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Reply #1 on: Jul 28, 2018
Answer to Question 1

400 m (rounded to two significant figures)

Answer to Question 2

b


silviawilliams41

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Reply #2 on: Jul 28, 2018
Thank you!


brittrenee

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Reply #3 on: Jul 28, 2018
Always glad to help...


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