A light glass beaker is hung from a spring balance

PHYSICS · Multi-part · AP · Physics 1: Algebra-based · Fluids · Fluids

Problem

A light glass beaker is hung from a spring balance. The balance reads

1.5\,\text N

when the beaker is empty and

3.0\,\text N

when the beaker is filled up to the

250\,\text{cm}^3

mark with an unknown liquid. Take

g = 10\,\text{m\,s}^{-2}

. (i) Calculate the mass of the empty beaker. (ii) Determine the mass of the liquid added. (iii) Find the density of the liquid in

\text{kg\,m}^{-3}

. (iv) The same volume of water would have a mass of

250\,\text g

. State whether the liquid is lighter or heavier than water, giving a reason based on your calculation.