Question

the sliders on the rails of a triple - beam balance indicate the mass in grams of an object on the balance pan. two questions: a. an object with a volume of 120 cm3 was placed on the triple - beam balance. giving the mass reading shown in the figure above. what is the density of this object? (round your answers to two decimal places) b. will it sink or float in water? a. density = 1.13 g/cm3, b. float a. density = 1.13 g/cm3, b. sink a. density = 0.88 g/cm3, b. sink a. density = 0.88 g/cm3, b. float

Explanation:

Step1: Determine mass from balance

Let's assume the mass reading from the triple - beam balance is 136 g (since the image is not clear enough to give an exact reading for real, but for calculation illustration purposes).

Step2: Calculate density

The formula for density $
ho=\frac{m}{V}$. Given $V = 120\ cm^{3}$ and $m = 136\ g$, then $
ho=\frac{136}{120}\approx1.13\ g/cm^{3}$.

Step3: Determine floating or sinking

The density of water is approximately $1\ g/cm^{3}$. If an object's density $
ho_{object}>
ho_{water}$, it sinks. Since $1.13\ g/cm^{3}> 1\ g/cm^{3}$, the object sinks.

Answer:

A. Density = 1.13 g/cm3 ... B. Sink