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Alex_Xolod [135]
3 years ago
7

Question 8 of 15

Physics
2 answers:
galina1969 [7]3 years ago
7 0

Answer:

D. They don't require a medium to travel through.

Explanation:

Electromagnetic waves and mechanical waves are both types of waves. Electromagnetic waves are waves that arise from the combination of electric and magnetic fields while mechanical waves are waves that arise as a result of transfer of energy via matter.

One major difference between these two types of waves is that electromagnetic waves such as light waves, radiowaves etc. do not need a medium to travel i.e. they can travel through a vacuum, while on the other hand, mechanical waves such as sound waves need a medium to travel.

Lynna [10]3 years ago
3 0

Answer:

They don't require a medium to travel through

Explanation: hope this helps

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The model below shows a carbide ion. 8 light grey and 6 dark grey balls sit at the center with 2 concentric black rings around t
azamat

Answer:

This carbide ion change into a neutral carbon atom.

Explanation:

Given that,

Light grey balls = 8

dark grey balls = 6

medium grey balls = 2

Charge on dark grey ball = +1

Charge on light grey ball = 0

Charge on medium grey ball = -1

We need to change this carbide ion to a neutral carbon atom

Using given data

A dark grey ball has one positive charge. It means, it is a proton.

A light grey ball has has zero charge. It means, it is a neutron.

A medium grey ball has one negative charge.It means, it is a electron.

We know that,

The number of proton and number of electron is equal in a neutral atom.

So, No charge is present on the given model of atom.

Therefore, we can say that the atom is neutral.

We know that,

The sum of total number of protons presents in an atom it is called atomic number.

So, The total number of protons is 8, the total number of electrons is 8 and the total number of neutrons is 9 in given atom.

Hence, This carbide ion change into a neutral carbon atom.

6 0
4 years ago
What is the difference in intensity for two sounds that are 40 dB apart?
Galina-37 [17]

the difference of 10 dB is considered as having 10 times the intensity, so difference of 40 dB means :

=》10 × 10 × 10 × 10

=》10000 times

so the the intensity of one sound is 10000 times the other one.

4 0
3 years ago
Read 2 more answers
A radioactive atom has just undergone nuclear decay. Its mass number is now four less than the original atom. Which type of nucl
fredd [130]

Answer:

Explanation:

mass number is now 4 times less than the original value so alpha decay occur during alpha decay the mass number is decreased 4 times and atomic number decreased 2 times than the original value

4 0
3 years ago
in oder to reduce the amount of energy lost due to heat flow, electricity is deliverd to our homes useing
Serhud [2]
High voltage transmission wires. Electrical lines you see outside of your home and basically everywhere you go.
4 0
4 years ago
Describe how radio waves are different from sound waves.
Lilit [14]

Answer:

sound and radio waves are completely different phenomena.

Explanation:

7 0
2 years ago
Read 2 more answers
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