Answer: the waves probably hits an open cavity
Explanation:
Sound waves transfers energy in form of vibration through water,the speed of sound is greatest in solids followed by liquids and gases,for we to observe such a reduction from 4000m/s to 1500m/s that means it sound had been transmitted through air like open cavity seen in intrusive rock beneath the earth.
<span>cooperation. i think that is it
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You calculated the density correctly.
When you drop anything into a fluid . . .
-- If the object is MORE dense than the fluid, it sinks.
-- If the object is LESS dense than the fluid, it floats.
We receive solar energy from the sun