CHEMISTRY MIDDLE SCHOOL

PLEASE ANSWERRRRRRTravels faster through air than metal.

electromagnetic wave, mechanical wave, or both.

Answers

Answer 1
Answer:

Electromagnetic wave travels faster through air than metal.

Option A

Explanation:

There are different kinds of wave energy. The most significant are electromagnetic and mechanical waves. The mechanical waves propagate through the medium by transfer of energy by vibrating of particles in medium.

So, the more number of particles present in the medium, the more fast the mechanical wave can propagate. So the mechanical waves travel faster in metals consisting of more number of free charge carriers. But electromagnetic waves does not need any of the medium to propagate. So it can travel faster in air than in metals.

Related Questions

Which class of compounds does ammonia blog
Lee conducts an experiment to see if mass is conserved when a piece of charcoal is burned for 5.0 minutes. He measures the mass of the charcoal before lighting it with a match. At the end of 5.0 minutes, Lee puts out the fire by suffocating it. After the charcoal has cooled, he measures its mass again. His data are below.Initial Mass | Final Mass.415 | .289Charlene tries to repeat Lee's experiment by using a different piece of charcoal. But she burns the charcoal for just 3.0 minutes and collects all of the gas and dust released by the burning charcoal. She then weighs the total mass of these objects. Her results are below.Initial Mass | Final Mass.498 | .498Charlene's experimental results indicate that mass was conserved. Why do Lee's results indicate that mass was not conserved?He burned the charcoal for a longer period of time than Charlene did.He did not collect the gas and dust released by the burning charcoal.He forgot to measure the mass of the charcoal while it was still burning.Mass is not conserved when an object undergoes a chemical change.
Which part of the human ear is part of the inner ear? A)cochleaB)oval window C)ear canalD)Hammer
The cell wall is a rigid structure that surrounds plant cells. The materials found in the cell wall protect the plant cells and give plants structural support.Which conclusion can be made given the above information?The structures of different types of cell organelles are similar.The functions of most cell organelles are hindered by their structures.The structure of a cell organelle is directly related to its function.The function of a cell organelle can change over time.
What does it mean if an experiment is replicable ? Why is it important that experiment be replicable

Which Idea was once accepted is now considered a scientifically inaccurate A.tge nucleus is the center of the atom
b.an atom is solid material
c.electrons have a negative charge
d.electrons are arranged in layers

Answers

Well, the nucleus is the center, the electrons are negative and arranged in layers, so atoms are not necessarily solid (you know, liquids, gases and plasma is made of atoms too -- plasma from ions, true)

Answer:

The answer is A

Explanation:

The accepted value for the percent by mass of water in a hydrate is 36.0%. In a laboratory activity, a student determined the percent by mass of water in the hydrate to be 37.8%. What is the percent error for the student's measured value?(1) 5.0% (3) 1.8%

(2) 4.8% (4) 0.05%

Answers

The original or accepted value for the percent by mass of water in a hydrate = 36%
Percen by mass of water in the hydrate determined by the student
in the laboratory = 37.8%
So the difference between the actual and the percent by mass in water determined by student = (37.8 - 36.0)%
             = 1.8%
So the percentage of error made by the student = (1.8/36) * 100 percent
                                                                             = (18/360) * 100 percent
                                                                             = ( 1/20) * 100 percent
                                                                              = 5 percent
So the student makes an error of 5%. Option "1" is the correct option.

Answer:

5%

Explanation:

What are the 2 main factors that affect how quickly a coastline erodes?

Answers

How strong the tides are and the type of material the water is hitting.

How could you test each molecule to
determine if it was DNA or RNA?

Answers

Answer:

Nucleobases should be checked. RNA contains adenine, guanine, cytosine and uracil instead of thymine, so if we isolate uracil, it means that it is RNA, if not, then is DNA.

Why is an oxygen molecule more stable than and oxygen atom ?

Answers

The diatomic oxygen has been more stable than the atom of oxygen due to the presence of a covalent bond.

The oxygen has been the nonmetal with 6 valence electrons. In order to attain a stable configuration, oxygen has to gain 2 electrons.

The elemental oxygen present in nature has been diatomic oxygen. The diatomic oxygen has been formed by the sharing of the 2 electrons of each atom resulting in the formation of the covalent bond.

The covalent bond formation helps the oxygen atom to attain the noble gas configuration. Thus, diatomic oxygen has been more stable than atomic oxygen.

For more information about the stability of the oxygen, refer to the link:

brainly.com/question/13031115

Answer:

Both atoms in an O2 molecule have achieved a noble gas electron configuration. – An oxygen atom does not have a stable octet of valence electrons.

Explanation:

What is likely the homeostatic reason for developing a fever

Answers

Answer: Fever ( also termed as pyrexia) is a state of body in which internal body temperature rises substantially beyond the normal range of body temperature. It is commonly caused by the infection of pathogenic agents ( such as virus and bacteria) in the body.

It is a common way to fight against and eliminate the infection as it enhances the amount of anticancer and antiviral interferon in the blood, which do not allow the infectious agents to replicate. Apart from this, they are also temperature sensitive and therefore replication becomes difficult.

Thus, presence of a fever usually corresponds to stimulation of immune response of body to fight against the infectious agents.
Your immune system discovers a foreign object and starts to fight back.  
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