How could you predict the sinking/floating behavior of a spherical object?

To predict the sinking/floating behavior of a spherical object, you could determine its density.

Step 1. Determine its mass on a suitable balance.

Step 2. Determine its volume

Either

Measure its circumference. C = 2πr, so you can calculate r

or

Measure its diameter. d = 2r, so you can calculate r

Then

V = ⁴/₃πr³ , so you can calculate its volume.

Step 3. Calculate its density (D).

Density = mass/volume

If D < 1 g/cm³, the object will float in water. If D > 1 g/cm³, the object will sink.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.