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Author Question: Which of the following air pollutants is emitted in about equal amounts by stationary and mobile ... (Read 129 times)

bio_gurl

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  • Posts: 524
on: Jul 28, 2018
Which of the following air pollutants is emitted in about equal amounts by stationary and mobile sources?
 a. particulates
  b. carbon monoxide
  c. sulfur dioxides
  d. hydrocarbons
  e. nitrogen oxides

Question 2

A 5.0-kg mass is attached to the ceiling of an elevator by a rope whose mass is negligible. What force does the mass exert on the rope when the elevator has an acceleration of 4.0 m/s2 upward?
 a. 69 N downward
  b. 29 N downward
  c. 49 N downward
  d. 20 N downward
  e. 19 N downward


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millet

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

e

Answer to Question 2

A


bio_gurl

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Reply 2 on: Jul 28, 2018
Wow, this really help

ryhom

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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