



 
Hi, When you measure the mass of the liquid you measure it without the trapped bubbles and hence the mass measurement should be correct. With the bubbles in the pipet however the volume measurement is incorrect, it is too large. Thus in the calculation density = mass/volume the denominator is increased by the volume of the bubbles and when you increase the denominator of a fraction the value of the fraction decreases. Thus the density you obtain from this calculation is too small. Penny  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 