To measure the density of a crayon, first weigh the crayon using a scale to obtain its mass. Next, measure its volume by submerging it in water in a graduated cylinder and recording the change in water level. Finally, calculate the density by dividing the mass by the volume (density = mass/volume). This will give you the density of the crayon in units such as grams per cubic centimeter (g/cm³).
Yes, a crayon has greater density than pieces of crayon, assuming the pieces are not heated and mashed together. That's because the crayon has density X and air has a lower density Y. Some combination of X and Y will always be less than X.
Centimetres.
Grams
If you are measuring it's length, a ruler is adequate
A crayon will generally sink in water because its density is greater than that of water. However, if the crayon has air pockets trapped inside, it may float due to the buoyancy provided by the air.
Centimeters
The density of a substance is the ratio of its mass to its volume. So, I would measure the mass and volume of a substance to calculate density.
Its the same, even though the mass is smaller, so is the volume, there for the mass to volume ratio stays the same when you cut it in half.
if you measure a crayon with inches is not the same as measuring with feet.
To measure the density of a metal bolt, you would first weigh the bolt using a scale. Then, you would measure the volume of the bolt, for example by using a water displacement method. Finally, you would calculate the density by dividing the mass of the bolt by its volume.
To find the density of a quarter, you would first measure its mass using a scale. Then, you would measure its volume by water displacement, where you would measure the amount of water the quarter displaces when submerged. Finally, divide the mass by the volume to calculate the density of the quarter.
You could measure its length and diameter in inches or millimetres, according to the usage of your country. And similarly for the mass, the units would be grams or ounces. The colour you could describe as the coordinates on a tri-stimulus colour diagram.