Why would a scientist have difficulty using sound waves to measure the thickness of a very wide, solid rock mountain? a. Most of the sound waves would travel too quickly to be detected.

b. Most of the sound waves would not enter the solid rock..

c. Most of the sound waves would travel through the rock and continue moving straight, never to return.

d. Most of the sound waves would lose too much of their energy as they traveled through the rock to return

PLZ EXPLAIN Y THE ASWER IS RIGHT

the sphincter muscles at the end of the digestive tract is the anus.

a

explanation:

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.