galactic disk
The galactic disk is a thinned, leveled out distribution of stars which includes the typical to the largest and brightest. The Sun is in the Milky Way and lies amongst the majority of the stars where it bulges.
<u>Answer:</u> The number of photons are 
<u>Explanation:</u>
We are given:
Wavelength of microwave =
(Conversion factor:
)
- To calculate the energy of one photon, we use Planck's equation, which is:

where,
h = Planck's constant = 
c = speed of light = 
= wavelength = 0.122 m
Putting values in above equation, we get:

Now, calculating the energy of the photon with 88.3 % efficiency, we get:

- To calculate the mass of water, we use the equation:

Density of water = 1 g/mL
Volume of water = 165 mL
Putting values in above equation, we get:

- To calculate the amount of energy of photons to raise the temperature from 23°C to 100°C, we use the equation:

where,
m = mass of water = 165 g
c = specific heat capacity of water = 4.184 J/g.°C
= change in temperature = 
Putting values in above equation, we get:

This energy is the amount of energy for 'n' number of photons.
- To calculate the number of photons, we divide the total energy by energy of one photon, we get:

q = 53127.72 J
E = 
Putting values in above equation, we get:

Hence, the number of photons are 
Answer:

Option A is correct
Explanation:
Let's check the options:
A: The electron has a negative charge and is found outside of the nucleus.
Yeah! It's TRUE . An electron is a <u>negatively</u><u> </u><u>charged</u><u> </u><u>particle</u><u> </u><u>and</u><u> </u><u>is</u><u> </u><u>located</u><u> </u><u>outside</u><u> </u><u>the</u><u> </u><u>nucleus</u><u> </u><u>of</u><u> </u><u>an</u><u> </u><u>atom.</u>
B : The neutron has a negative charge and is found in the nucleus.
No! It's FALSE . A neutron carries <u>no </u><u>charge</u>. i.e it is a neutral particle and found inside the nucleus.
C : The proton has no charge and is found in the nucleus.
No! It's FALSE.A proton is a <u>positively</u><u> </u><u>charged</u><u> </u><u>particle</u> present inside nucleus of an atom.
D : The neutron has no charge and is found outside of the nucleus.
I agree that the neutron has no charge. But it is found <u>inside</u> the nucleus not outside . So, this statement is FALSE .
Hence, we found our answer! :D
A. The electron has a negative charge and is found outside of the nucleus is the correct statement about an atom.
Hope I helped!
Best regards! :D
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The correct answer should be a
Answer:
where is volume? formula of density is: mass/volume so volume must be there