The initial volume reading in a graduated cylinder is 30 ml. the mass of an irregular shape of an unknown metal piece is 55.3 g. the final volume reading in the graduated cylinder is 37 ml. the density of this unknown metal is

7.9

Explanation:

When we put the metal piece in the liquid (which is in the graduated cylinder), how much it goes up is equal to the volume of the piece we inserted.

So now we know that the volume of that piece of unknown metal is 7mL (which is the same as 7).

Density is .

So the density of that piece of metal is

Which leaves us with a final density of 7.9

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.

no simpler subs form complex ones. synthesise = make