A Rock Is Suspended from a Scale Reads 20

Multiple Choice

A rock is suspended from a scale reads 20.0 N. A beaker of water (having a density of 1000 kg/m³) is raised up so the rock is totally submerged in the water. The scale now reads 12.5 N. What is the density of the rock?

A) 1.60 × 10³ kg/m³
B) 2.50 × 10³ kg/m³
C) 2.33 × 10³ kg/m³
D) 3.00 × 10³ kg/m³
E) 2.67 × 10³ kg/m³