Answer:
the first one, gas
Explanation:
if its not what you looking for my b
The nucleus is always positive since thats where the protons are located and the neutrons have no charge....
Answer:
Venus
Explanation:
basic 2nd grade smarts "no offense"
Answer: Taking into account sound is a wave, we can use the information of the displacement (generally given as a graph) to find the wavelength and frequency, then we can calculate the speed with the formula of the speed of a wave.
Explanation:
If we have the displacement graph of the sound wave, we can find its amplitude, its wavelength and period (which is the inverse of frequency).
Now, if we additionally have the frequency as data, we can use the equation of the speed of a wave:

Where:
is the speed of the sound wave
is the wavelength
is the frequency