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Author Question: About 78 of the air is composed of a)carbon dioxide. b)oxygen. c)nitrogen. ... (Read 92 times)

WhattoUnderstand

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on: Jul 28, 2018
About 78 of the air is composed of
  a)carbon dioxide.
  b)oxygen.
  c)nitrogen.
  d)argon.

Question 2

A 2.5-kg object suspended from the ceiling by a string that has a length of 2.5 m is released from rest with the string 40 below the horizontal position. What is the tension in the string at the instant when the object passes through its lowest position?
 a. 11 N
  b. 25 N
  c. 42 N
  d. 18 N
  e. 32 N


janeli

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

c

Answer to Question 2

c


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