« previous next »

Author Question: About 78 of the air is composed of a)carbon dioxide. b)oxygen. c)nitrogen. ... (Read 60 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?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

Did you know?

Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

Some of the bacteria that can fix atmospheric nitrogen, converting it into a form usable by plants. Some of the bacteria that can fix atmospheric nitrogen, converting it into a form usable by plants.
When the exhaust is rich, the output of a zirconia oxygen sensor is above 450 mV. When the exhaust is rich, the output of a zirconia oxygen sensor is above 450 mV.
Testing an oxygen sensor using a DMM set on DC volts. With the engine operating in closed loop, ... Testing an oxygen sensor using a DMM set on DC volts. With the engine operating in closed loop, ...
A backpressure tool can be made by using an oxygen sensor housing and using epoxy or braze to hold ... A backpressure tool can be made by using an oxygen sensor housing and using epoxy or braze to hold ...
Functional Groups of Carbon Functional Groups of Carbon
Silicon dioxide ingredient Silicon dioxide ingredient
Video: Contraction cycle of a sarcomere

For a complete list of videos, visit our video library