Astudent measures the mass and volume of a sample of copper at room temperature and 101.3 kpa. the mass is 48.9 grams and the volume is 5.00 cubic centimeters. the student calculates the density of the sample. what is the percent error of the student's calculated density? 7.4% 8.4% 9.2% 10.2%

Answer is: the percent error is 9.2%.

d(Cu) = 8.96 g/cm³; accepted density of copper.
m(Cu) = 48.9 g.
V(Cu) = 5.00 cm³.
d₁(Cu) = m(Cu) ÷ V(Cu).
d₁(Cu) =48.9 g ÷ 5.00 cm³.
d₁(Cu) = 9.78 g/cm³; calculated density of copper.
the percent error = (d₁(Cu) - d(Cu)) ÷ d(Cu) · 100%.
the percent error = (9.78 g/cm³ - 8.96 g/cm³) ÷ 8.96 g/cm³ · 100%.
the percent error = 9.2 %.

Okay well gravitational energy is matter forced by gravity making energy though the kinetic energy then the electric energy produces electricity from the kinetic energy and the kinetic energy gets its energy from the gravitational energy. was that the answer you wanted or something else?  

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