Determine the density of an iron bar weighing 78 g if its length is 1 dm, width is 20 mm, and height is 0.5 cm.
| January 9, 2021 | education
a = 0.5cm,
b = 2cm,
s = 10cm
v = 0.5 * 2 * 10 = 10sq.cm.
According to the density formula
p = m / v.
p = 78/10 = 7.8g / cc. (7800kg / cubic meter)
(m -mass = 78g, v-volume, p (po) -density)
Answer: 7.8g / cc
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