A)Constant pumping from the heart which provides adequate pressure necessary to move the blood through the arteries and veins
B)Gravitational force
Bohr's atomic model proposed that electrons move in specific orbits around the nucleus of an atom.
Answer
B. acid + base --> salt + water
Explanation
Acids are substances that dissolve in water to produce hydrogen ions, H+.A base is a substance that dissolves in water to produce hydroxide ions, OH-.In a chemical reaction of an acid and a base, the products are a salt and water.For example when hydrocholoric acid is added to sodium hydroxide, a salt namely sodium chloride is formed with additional water.
C) and d) are physical changes while b) is chemical
Question:
How many neutrons are there in 186W
Answer:
112
hope it helps (^^)
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