Question

a match box of 5 by 5 by 1 dimensions is filled with nuclear matter its weight is in the order of

Answer 1

Nuclear Matter is generally made of Uranium and other radio-topes.
D = 19.05 g/cm³
M = x
V = (5 × 5 × 1) cubic.units
V = 25 cm³
$d \: = \: \frac{m}{v}$
$m \: = \: d \: \times \: v$
m = 19.05 g/cm³ × 25 cm³
m = 476.25 g.
Hence, the mass is of the order of 400 g — 600 g