Solar wind from stars . a: is cool and refreshing
b: travels through nebulas and makes them glow brighter
c: creates new constellations approximately every five minutes
d: keeps the moon from spinning out of the galaxy

Compare and contrast refraction of light and sound will give brainliest

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.