Answer:
B. salt dissolved in water
Explanation:
a mixture is multiple substances mixed together
The photoelectric effect occurs when light shines on a metal. ... Light of any frequency will cause electrons to be emitted.
A strong chemical bond is formed by sharing electrons.
El Niño = the boy, La Niña = the girl. You can tell from the ending and the first word.
Answer:
Positive: a and b
Negative: c
Explanation:
The entropy (S) is the measure of the randomness of the system, and it intends to increase. The randomness can be determined by the energy of the molecules, their velocity and how distance they are between the other molecules.
When the entropy increases, ΔS is positive, when the entropy decreases, ΔS is negative. So, when gasoline mix with air in a car engine, the process intends to continue, the randomness increases and ΔS is positive. When hot air expands, the distance between the molecules increases, so ΔS is positive.
But, when humidity condenses, the molecules stay closer, so there's a decrease in the randomness, then ΔS is negative.
