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satela [25.4K]
3 years ago
14

True or false: Electromagnetic waves can pass through a vacuum but mechanical waves can not.

Physics
1 answer:
grin007 [14]3 years ago
7 0
True i believe. It says my comment has to be longer so i’m just typingggg
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Which of the following statements are true? Check all that apply.
lidiya [134]

We have 6 levels and we will verify which of them is true.

<em>A ) Electric charge is conserved </em>

According to the conservation of charge, an electric charge can neither be created nor be destroyed.

Therefore this statement is TRUE.

<em>B ) A positive charge and negative charge attract each other</em>

According to the properties of charges, the opposite charges attract each other and similar charges repel each other

Therefore this statement is  TRUE

<em>C) Two positive charges attract each other.</em>

Using the previous law, we can observe that this statement is false, because equal charges repel each other.

Therefore this statement is FALSE.

<em>D ) Two negative charges repel each other.</em>

Using the same principle as the two previous statements, two equal charges repel each other.

Therefore this statement is TRUE

<em>E) Electric charge is quantized.</em>

According to the quantization of charge, charges can take values only in integral multiples of a fundamental unit of charge.

Therefore this statement is TRUE.

<em>F) A neutral object contains no charge.</em>

A neutral object contains equal amount of negative and positive charge. Thus, in totality a neutral object contains no charge.

Therefore this statement is TRUE.

8 0
3 years ago
When looking at a graph what are the first 3 things you should do?
Valentin [98]

Answer: Look where the points are.

Explanation:

4 0
3 years ago
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A CD-ROM is a compact disk that
Greeley [361]
<span>CD stands for Compact Disk and ROM stands for Read Only Memory. CD-ROMS were designed to store information that the computers can read and you cannot overwirte on it. S,o the answer is the option C.: A CD-ROM is a compact disk that contains stored information that can be read on a computer.</span>
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3 years ago
How would I calculate the X from a known velocity when launching a ball off a table?
Anon25 [30]
Here are the steps you would need to follow:

#1). Define what 'the 'X is, and how it's related to the ball.
#2). Be clear on how 'the X' is related to the 'known velocity'.
#3). Identify how the 'known velocity' is related to the action of the ball when it's launched.

With this information in front of you, you'll have a much better chance
of answering the question.

With none of it in front of me, I have no chance at all.
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3 years ago
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Abnormal levels of __________ may lead to schizophrenia and Parkinson’s disease.
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Answer:

Dopamine is a neurotransmitter chemical which is released by the neurons of the brain for transfer of information from cell to cell. It regulates the movement and emotional responses in the human body. The abnormal levels of dopamine can be responsible for the neurological diseases.

The decrease of dopamine liberation from the substantia nigra of the brain can lead to Parkinson's disease whereas the excess release may lead to over-sensitivity of the dopamine receptors and can be responsible for the disease schizophrenia.

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