Which particles in an atom could demonstrate that opposite charges attract?
2 answers:
Answer:
Choice D. a proton and an electron.
Explanation:
Each proton carries a positive charge of unit.
Each electron carries a negative charge of unit.
As their name suggests, neutrons are neutral. They do not carry any electrostatic charge. Because of that, neutrons can't attract or repel neutrons or protons with electrostatic forces.
On the other hand, electrons and protons carry opposite charges. Therefore, an electron and a proton would attract each other electrostatically.
However, since protons are all positive, two protons would repel each other electrostatically.
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Answer:
Explanation:
The frequency of a wave can be found using the following formula.
where <em>f</em> is the frequency, <em>v</em> is the velocity/wave speed, and λ is the wavelength.
The wavelength is 10 meters and the velocity is 200 meters per second.
- 1 m/s can also be written as 1 m*s^-1
Therefore:
Substitute the values into the formula.
Divide and note that the meters (m) will cancel each other out.
- 1 s^-1 is equal to Hertz
- Therefore, our answer of 20 s^-1 is equal to 20 Hz
The frequency of the wave is <u>20 Hertz</u>