What is the layer in which radio waves bounce off ions and then return back to earth called
QUESTION POSTED AT 16/04/2020 - 06:12 PM
Answered by admin AT 16/04/2020 - 06:12 PM
Ionosphere Hope that helps!
Related questions
Which of the following is not a property of a base? Please explain your answer. Change red litmus to blue Feel slippery to the touch Produce OH- ions Have a sour taste
QUESTION POSTED AT 02/06/2020 - 01:24 AM
Elements that can have several different structures with different physical properties are called?
QUESTION POSTED AT 01/06/2020 - 04:48 PM
Which layer underground where all empty spaces are filled with a combination of air and water
QUESTION POSTED AT 01/06/2020 - 04:42 PM
Which of the following applies to valid data? Check all that apply. .The data is inaccurate. .The data is collected with care. .The data does not answer the questions of the experiment. .The data is related to the variables of the experiment. its earth science
QUESTION POSTED AT 01/06/2020 - 04:38 PM
Matter is made up of small particles called
QUESTION POSTED AT 01/06/2020 - 04:32 PM
Gas molecules colliding with the walls of a container exert a force called ___
QUESTION POSTED AT 01/06/2020 - 04:14 PM
What characteristic do the elements in group 1 share? They tend to lose one electron to become a 1+ ion. They tend to gain one electron to become a 1- ion They gain one proton to achieve a stable nucleus. They share electrons with a metal in a covalent bond.
QUESTION POSTED AT 01/06/2020 - 04:01 PM
What is the best reason for the difference in properties of LiCl and C6H14O? LiCl and C6H14O have different atomic masses. Cl and O belong to different groups of the periodic table. One compound is ionic, and the other is metallic. One compound is covalent, and the other is ionic. Mark this and return Save and Exit
QUESTION POSTED AT 01/06/2020 - 03:52 PM
Which two electromagnetic waves are useful for diagnosing illnesses? X-rays and radio waves microwaves and gamma rays gamma rays and X-rays radio waves and ultraviolet waves
QUESTION POSTED AT 01/06/2020 - 03:41 PM
What occurs when there are OH- ions in a solution?
QUESTION POSTED AT 01/06/2020 - 03:07 PM
In chemical reactions, the substances present at the start of the reaction are called, and the substances produced are called
QUESTION POSTED AT 01/06/2020 - 01:36 PM
Here is a more complex redox reaction involving the permanganate ion in acidic solution: 5fe2+ + 8h+ + mno4? ? 5fe3+ +mn2+ + 4h2o
QUESTION POSTED AT 01/06/2020 - 01:02 PM
The correctness of a scientific claim comes from a.the scientists near perfect record b.its acceptance by the public c.the accuracy of the data and observations d.the number of years that went into making the claim the class is actually earth science
QUESTION POSTED AT 29/05/2020 - 05:29 PM
To achieve an octet of valence electrons, an iodine atom will become an ion with what charge?
QUESTION POSTED AT 29/05/2020 - 05:01 PM
When the temperature of the air is 50°C, the velocity of a sound wave traveling through the air is approximately A. 50 m/s. B. 361 m/s. C. 30 m/s. D. 381 m/s.
QUESTION POSTED AT 29/05/2020 - 04:52 PM
Which best describes the definition of Lewis acids and bases? a general definition based on electron structure a general definition based on hydrogen ion concentration a specific definition based on a compound’s ability to accept protons a specific definition based on a compound’s ability to donate protons
QUESTION POSTED AT 29/05/2020 - 03:07 PM
PLEASE!!! I NEED HELP ASAP!! A rubidium isotope has a half-life of almost 50 billion years. Given that scientists estimate Earth's age to be 4.6 billion years, what is the most likely percentage of parent to daughter isotopes of this element currently existing on Earth?
QUESTION POSTED AT 29/05/2020 - 02:45 PM
When marco is sick, he tests the ph of his saliva and finds that it is 5.9. what is the hydrogen ion concentration of his saliva? (round your answer to seven decimal places.)?
QUESTION POSTED AT 29/05/2020 - 02:15 PM
Is there evidence that methanol forms ions when dissolves in water
QUESTION POSTED AT 29/05/2020 - 01:55 PM
The pH of lemon juice at 298 K is found to be 2.32. What is the concentration of mc014-1.jpg ions in the solution?
QUESTION POSTED AT 29/05/2020 - 12:52 PM
In which of the following is number of electrons the ion contains given correctly? A. H+ has 1 electron. B. Br- has 34 electrons. C. Al3+ has 16 electrons. D. Ca2+ has 18 electrons
QUESTION POSTED AT 29/05/2020 - 10:24 AM
Potassium bromide is an ionic compound. If you dissolve potassium bromide in water and add electricity, what will happen? It will __________. Select one: a. explode b. become a covalent compound c. allow ions to flow through the water d. become an acid
QUESTION POSTED AT 29/05/2020 - 09:27 AM
Select the ion. Mg H+ HC2H3O2
QUESTION POSTED AT 29/05/2020 - 08:47 AM
Atoms and ions of different elements ALWAYS have different numbers of... A. Electrons B. Neutrons C. Protons D. Masses
QUESTION POSTED AT 29/05/2020 - 08:47 AM
What part of the nervous system is often called the "fight or flight" system? a. Parasympathetic c. Sympathetic b. Peripheral d. Autonomic
QUESTION POSTED AT 29/05/2020 - 08:14 AM
The wavelength of a given region of the electromagnetic spectrum ranges from 1 x 10-11 - 1 x 10-8 meters. Which waves are found in this region?
QUESTION POSTED AT 29/05/2020 - 08:06 AM
The wavelength of a given region of the electromagnetic spectrum ranges from 1 x 10-11 - 1 x 10-8 meters. Which waves are found in this region?
QUESTION POSTED AT 29/05/2020 - 08:06 AM
A water wave travels 36 meters in 15 seconds.whatvis the speed of water?
QUESTION POSTED AT 29/05/2020 - 02:29 AM
Consider the compound hydroxyapatite, Ca10(PO4)6(OH)2. Name each ion present, give the charge of each ion and show that the formula represents a neutral compound. HELP!
QUESTION POSTED AT 29/05/2020 - 01:56 AM