Arectangular block of copper metal has a mass of 1896g. the dimensions of the block is 213cm3 . what is the density of copper?

So remember that Density = mass/volume . In this case, the mass is 1896 g and the volume is 213 cm³. With this information, divide as such:

In short, the density of the copper is (rounded to the hundredths) 8.90 g/cm³

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.