Question

A solid has a volume of $8{cm}^3$. When weighed on a spring scale calibrated in grams, the scale indicates $20g$. What does the scale indicate if the object is weighed while immersed in a liquid of density $2g/{cm}^3$?

• A. $16g$
• B. $10g$
• C. $12g$
• D. $4g$

Answer 1

The correct option is D $4g$

$Volume=8cc$

$Density=\frac{Mass}{Volume}$

$Mass=8cc\times 2g/c{m}^3$

$Mass=16g$

$\therefore$ 8cc of this liquid has a mass of 16g

Scale indicates if the object is weighed while immersed in a liquid of density 2g/cm^3 $=(20-16)=4g$