« previous next »

Author Question: About 78 of the air is composed of a)carbon dioxide. b)oxygen. c)nitrogen. ... (Read 51 times)

WhattoUnderstand

  • Hero Member
  • *****
  • Posts: 517
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

  • Sr. Member
  • ****
  • Posts: 346
Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

c


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

A soil surface crust that includes nitrogen-fixing, soil-enriching cyanobacteria. A soil surface crust that includes nitrogen-fixing, soil-enriching cyanobacteria.
Geometry of carbon bonding Geometry of carbon bonding
The oxygen isotope curve illustrates the ratio between 16O and 18O. The oxygen isotope curve illustrates the ratio between 16O and 18O.
A conventional zirconia oxygen sensor can only reset to exhaust mixtures that are richer or leaner ... A conventional zirconia oxygen sensor can only reset to exhaust mixtures that are richer or leaner ...
Reactive oxygen species (ROS) Reactive oxygen species (ROS)
Pathways of nitrogen metabolism (purple) in the general pattern of intermediary metabolism Pathways of nitrogen metabolism (purple) in the general pattern of intermediary metabolism
Video: Humerus Adduction Animation

For a complete list of videos, visit our video library