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Lerok [7]
2 years ago
7

HELPPPPP

Chemistry
1 answer:
Darya [45]2 years ago
8 0

Answer:

Sound waves are faster than light waves when traveling through the air.

(This statement is NOT true)

or

Sound waves and electromagnetic waves are both needed to talk on a cell phone

Explanation:

Sound waves need a medium to travel through, but light does not.

Also, the statement "Sound waves and electromagnetic waves are both needed to talk on a cell phone" might also be NOT true, since, as far as I know, cellphone calls need radio and sound waves, not electromagnetic waves.

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A patient taking _______ would have a history of mental depression.
ohaa [14]
The answer is Prozac
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3 years ago
First person to comment there crush name get brainlyest
aleksandr82 [10.1K]

Answer:

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Explanation:

David <3

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3 years ago
Which of the following measurements is used to measure the enthalpy of combustion? A. None of these B. Measuring the change in t
DaniilM [7]

Answer: Option (C) is the correct answer.

Explanation:

In a substance, the total energy of its molecular motion is known as heat. Whereas when we measure the average energy of molecular motion of a substance then it is known as temperature.

So, any increase or decrease in temperature will lead to change in heat of a substance.

When one mole of a substance is burned then the amount of energy released  in the form of heat is known as heat of combustion.

Relation between heat and temperature is as follows.

                    q = m \times C \times \Delta T

Thus, we can conclude that to measure the enthalpy of combustion it cannot be measured, only calculated using the equation; q = mc \Delta T.

4 0
3 years ago
Please help me out asap. I’ll give brainliest
mestny [16]

Answer:

I belive the answer is A but the image quality is hard to tell.

Explanation:

As pressure increases the higher the melting point of rock becomes making it harder to melt, thats why molten rocks brought to the surface melt because of the change in pressure.  

7 0
3 years ago
I need help yall ill mark brainliest :)
garri49 [273]

Answer:

How does non-human life in an urban ecosystem differ from that in an undeveloped forest ecosystem?

Explanation:

In forest eco system the people are uncivilized and not so much educated. And in urban eco system people are intelligent as well as educated this is the main reason. In an urban ecosystem, the only non-human life that live there are the ones that are able to survive under the conditions. However, in undeveloped forest ecosystems, there’s barely any pollution. Therefore, a bigger variety of non-human life is able to live here.

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