1 Cal ---------- 4.184 J
? Cal ---------- 130.0 J
130.0 x 1 / 4.184 => 31.07 Cal
hope this helps!
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Waves travel through matter, so I am 99.9% sure that is the answer.
Id look through your lesson to be sure!
The spherical object will float and the square object will sink to the bottom of the fluid as it has greater density. :)
