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Verizon [17]
3 years ago
12

Which of the following processes are Exothermic? I. Melting II. Sublimation III. Vaporization IV. Condensation

Physics
1 answer:
mariarad [96]3 years ago
7 0

Answer: condensation process is exothermic. The correct option is IV.

Explanation: Exothermic reaction is a chemical reaction in which heat is released to the surrounding environment.

condensation is defined as a process by which a medium changes from gaseous phase into liquid phase. Using water molecules to illustrate, to transform water molecules to gaseous phase it requires the heat of vaporization to be overcomed. This same hear of vaporization needs to be given off when changing back to liquid phase.

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If the<br> refractive index of benzere is 2.419,<br> what is the speed of light in benzene?
Grace [21]

Answer:

v=1.24\times 10^8\ m/s

Explanation:

Given that,

The refractive index of benzene is 2.419

We need to find the speed of light in benzene. The ratio of speed of light in vacuum to the speed of light in the medium equals the refractive index. So,

n=\dfrac{c}{v}\\\\v=\dfrac{c}{n}\\\\v=\dfrac{3\times 10^8}{2.419}\\\\v=1.24\times 10^8\ m/s

So, the speed of light in bezene is 1.24\times 10^8\ m/s.

4 0
3 years ago
Jenny wanted to make 3 molecules of a substance made with aluminum and oxygen. How many aluminum and oxygen atoms will she need?
olasank [31]
The correct answer is: Option (D) 6 aluminum and 9 oxygen!

Explanation:
Since the one molecule of aluminium and oxygen is Al2O3 (Aluminum oxide). It has 3 oxygen atoms and 2 aluminium atoms. It find the atoms for the 3 molecules, multiply them with 3.

3 * 3 oxygen atoms = 9 oxygen
3 * 2 aluminum atoms = 6 aluminum ( Option D)
6 0
3 years ago
Read 2 more answers
What affect does a quadrupling of the mass have a upon the acceleration of the object
Sergeu [11.5K]

Answer:

Explanation:

When the body has mass m

The force on a body is given as

F=ma

a=F/m

Then,

When you the mass is quadruple

i.e M=4m.

Then, let assume you are applying the same force

Then, using F=Ma

F=4ma

a=F/4m

This shows that the acceleration is reduced by quarter it former values.

7 0
3 years ago
If someone weighs 80n on Mars and comes back on earth will they weigh the same
Alexandra [31]

Answer:

No

Explanation:

Your answer will be no because Mars has less gravity then Earth does but you would still have the same amount of mass therefor If someone goes to Mars and goes back to Earth they would not weigh the same as they did on earth.Hope it helps you!

8 0
2 years ago
Read 2 more answers
In which era did the universe’s clouds start to condense and the universe became transparent for the first time?
alukav5142 [94]

Answer:

The Universe became transparent to the light left over from the Big Bang when it was roughly 380,000 years old

Explanation:

8 0
3 years ago
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