Answer:
Question 19: 4. -2
Question 20: 1. -1
Explanation:
Protons always have a positive (+) charge.
Neutrons always are a neutral (0) charge, or no charge.
Electrons always have a negative (-) charge.
<u>Question 19:</u>
We have 8 protons, so a +8 charge.
We also have 10 electrons, so a -10 charge.
-10 + 8 = -2, or a -2 charge.
<u>Question 20:</u>
We have 1 proton, so a +1 charge.
We also have 2 electrons, so a -2 charge.
1 - 2 = -1, or a -1 charge.
The results of the experiments should be similar.
B it’s basically a geological hole in the earth (depression in earth)
Answer:
Solu.tion- salt.water
Suspension- soil mixed water
Colloid- gelatin
<span>Which statement best describes wavelength?
C. Wavelength is the length of one complete wave cycle.
As demonstrated by the Doppler effect, why does sound increase in pitch as a sound source approaches you?
B. The waves are closer together because the object is moving toward you.
Which statement best describes frequency and pitch?
A. Pitch is how frequency is perceived.
Hope these answer the question. Have a nice day.</span>