1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Marizza181 [45]
3 years ago
9

What is it called when Earth’s magnetic poles change places?

Chemistry
2 answers:
emmasim [6.3K]3 years ago
8 0

Answer: b

Explanation:just took test

Igoryamba3 years ago
4 0

Answer:

Its b. Magnetic reversal

Explanation:

You might be interested in
A salt is best described as a compound that is formed from the reaction between
kaheart [24]

Answer:

b

Explanation:

5 0
3 years ago
Could someone explain what oxidation numbers are and what these questions are asking of me?
Oxana [17]

The oxidation state, sometimes referred to as oxidation number, describes the degree of oxidation of an atom in a chemical compound.

<u>Explanation:</u>

The oxidation number of an atom is the charge that atom would have if the compound was composed of ions. 1. The oxidation number of an atom is zero in a neutral substance that contains atoms of only one element. The oxidation number of simple ions is equal to the charge on the ion.

The oxidation number of a mono atomic ion equals the charge of the ion. The oxidation number of H is +1, but it is -1 in when combined with less electro negative elements. The oxidation number of O in compounds is usually -2, but it is -1 in peroxides. The oxidation number of a Group 1 element in a compound is +1.

6 0
3 years ago
Not enough air is pumped into an inflatable life raft to make completely filled out the atm pressure is 14.7psi what is the pres
sasho [114]
If you do not inflate the life raft to make completely filled out, as long as you do not press or squeeze  the life raft, the air inside it will be in equilibrium with the air outside the raft, and so the pressure inside the life raft will be the same atmospheric pressure, 14.7 psi.

Note that when the raft is swollen, if you punch it, the air will leave from it which means that the pressure inside is greater than the atmospheric pressure.
5 0
3 years ago
How do scientists prevent the nonpolar perfluorocarbons
Pavel [41]

Scientists prevent the nonpolar perfluorocarbons

in Oxygent from separating from the water by adding surfactant.

<u>Explanation:</u>

The  collection of oxygen from lungs and transporting it  all those tissues present in the human body and taking carbon dioxide back to lungs are the main functions of the hemoglobin. But, instead of this hemoglobin, When perfluorocarbons , a nonpolar chemical is used to perform the same function for the oxygen transportation, the nonpolar chemical may not mix well with the water when this perfluorocarbons is taken through a water-based saline .

For this purpose an addition of a chemical called surfactant is done. This will enhance the chemical bonding between the non polar chemical and water. The perfluorocarbons  spreads into some droplets and gets coated with this bonding substance. Thus it gets attached to the water.

3 0
3 years ago
A balloon filled with helium occupies 21.0ft³ at 55.0°F. Find the temperature of the helium if the volume of the balloon decreas
harkovskaia [24]

Answer:

Assuming pressure is held constant,the question reduces to a ratio and proportion type of question where;

At constant pressure,

21.0ft³-55.0°F

11.0fy³=11.0ft³/21.0ft³×55°F

The temperature is 28.809°F≈29°F

6 0
3 years ago
Other questions:
  • Why did improvements in agriculture lead to the growth of cities?
    13·1 answer
  • If a substance reacts with oxygen, the chemical reaction is most likely a combustion reaction. decomposition reaction. single re
    15·1 answer
  • Using electron configurations, explain why the halogens readily react with the alkali metals to form salts
    6·1 answer
  • For a successful TLC experiment, you need to pay attention to the details. From the list of instructions and tips below, select
    14·1 answer
  • If a gas occupies a volume of 950 mL at standard temperature, what volume will it
    14·1 answer
  • Why can tin (IV) sulfide and antimony (III) sulfide be separated from copper (II) sulfide and bismuth (III) sulfide by the addit
    11·1 answer
  • Give endothermic examples
    6·1 answer
  • HELP! WILL MARK BRAINLIEST! ASAP!!
    7·1 answer
  • A ________ alchohol has a -OH radical bonded to a central carbon atom.
    9·1 answer
  • Find the mass in kilograms of the liquid air that is required to produce 600L of oxygen. In normal condition, 1L of liquid air h
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!