[Answered] A ball dropped from the top of a building hits the ground 9.0 s later. How high is the building (in ...

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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 168 times)

silviawilliams41

Hero Member
Posts: 560

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

Sr. Member
Posts: 321

Reply #1 on: Jul 28, 2018

Answer to Question 1

400 m (rounded to two significant figures)

Answer to Question 2

b

silviawilliams41

Hero Member
Posts: 560

Reply #2 on: Jul 28, 2018

Thank you!

brittrenee

Sr. Member
Posts: 321

Reply #3 on: Jul 28, 2018

Always glad to help...

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