<span> applies to any object moving more slowly than the speed of light</span>
Answer:
Explanation:
Oxygen has an atomic number of 8,
Then, it has eight electrons revolving round its nucleus.
And since it a neutral atoms.
Number of neutron ≈ number of electron
Number of proton = Number of electron.
Then, the number of proton is 8
So, we can find it mass number of molecular weight
Molecular weight = number of proton + number of neutron
Molecular weight = 8 + 8
Molecular weight = 16g/mol
So, the correct answer is D
An atom of oxygen has 8 protons.
To predict future climate, scientists use computer programs called climate models to understand how our planet is changing. Climate models work like a laboratory in a computer. They allow scientists to study how different factors interact to influence a region's climate.
Now a new evaluation of global climate models used to project Earth's future global average surface temperatures over the past half-century answers that question: most of the models have been quite accurate.
If we are talking about sound decibels, then 10 dB equates to 10 times the power. I guess that means 10 times the intensity.
<span>In question A, I guess they are trying to make the point that 10 singers have a sound 10 times as intense as 1 singer, that is, intensities simply add. I don't think this is true in real life, as people can't sing exactly in phase for all notes, and sound waves cancel to some extent. So I don't know how to answer question B, except maybe to assume that intensities simply add. </span>
<span>For question C, that's a simple matter of noticing that 120 dB - 100 dB = 20 dB. But look at how decibels work - the answer is not 20 times. Hint: 30 dB would be 1000 times.</span>