Density = (mass)/(volume)
170 mm = 17 cm
25.4 mm = 2.54 cm
Volume = (17 x 2.54 x 2.54) = 109.6772 cm3
Density = 8.2/109.6772 = 0.0748gram/cm3
This is a very intriguing density for a rectangular rod ... only 7.5% as dense
as water, 2.8% as dense as aluminum, 14.1% as dense as lithium, the lightest
metal, and only 63 times as dense as room-temp sea-level air. We're suspicious
of the figure given for mass, but we stand behind our math.
Density is weight divided by volume. In the case of a rectangular solid, volume is length times width times height.
You divide its mass by its volume.
It is the mass of the block divided by its volume.
Volume x Density . . . yes
You multiply its density by its volume.
Density is weight divided by volume. In the case of a rectangular solid, volume is length times width times height.
9.047619047619048
You divide its mass by its volume.
It is the mass of the block divided by its volume.
If this rectangular solid is actually in your possession, then you would measure it and calculate the volume, after which you can derive the density by dividing the mass by the volume. If it is not in your possession, then you are clearly being asked to call upon your psychic powers to solve this problem.
Volume x Density . . . yes
You multiply its density by its volume.
You need its mass and volume.
W = Volume x weight density
Volume
on a balance
To find the density of a rectangular solid with just a ruler, you would need to measure the length, width, and height with the ruler. Then, calculate the volume by multiplying the three measurements together. Finally, divide the mass of the rectangular solid by the volume to find the density.