Question

mierea de albine are densitatea de 1422,5 kg pe m la a 3 a . ce masa au 2 litri de miere de albine?

Answer 1

 

$\displaystyle\bf\\\rho=1422,5~Kg/m^3\\Kg/m^3~~\textbf{este unitatea de masura in SI.}\\\\\textbf{Se mai folosesc si alte unitati de densitate}\\\textbf{din care vom alege pe cea convenabila}.\\\\\rho=1422,5~Kg/m^3=1,4224~tone/m^3=1,4224~Kg/dm^3=1,4224~g/cm^3\\\\Vom~alege~~~\rho=1,4224~Kg/dm^3\\\\\rho=\frac{masa}{V}\\\\masa=V\times~\rho\\\\1~litru=1~dm^3\\\\2~litri=2~dm^3\\\implies~V=2~dm^3\\\\masa=V\times~\rho=2~dm^3\times 1,\!4224~Kg/dm^3 =\\\\= 2\times1,\!4224=\boxed{\bf2,\!8448~kg~de~miere}$