Depending on the size of it id say either a 15cm ruler or a 30cm ruler.
A ruler would do the trick.
A ruler or tape measure.
To find the volume of a pencil, you can approximate it as a cylinder. Measure the diameter of the pencil to find the radius, and then measure its length. Use the formula for the volume of a cylinder, ( V = \pi r^2 h ), where ( r ) is the radius and ( h ) is the height (length of the pencil). Calculate the volume using these measurements.
Anything that you might measure in yards, can easily be measured in meters. For example, the length of a car, the distance to cross a street, etc. You would NOT use meters to measure something rather small like the length of a pencil.
I would go with inches but you could measure it in centimeters.
A ruler would do the trick.
Centimeters
Centimeters
Centimeters
A ruler or tape measure.
If you have to measure the pencil to a couple decimal places i would suggest a micrometer and a dial caliper.
centimeter
grams (for their mass), centimetres (for length), millimetres (for thickness/height), possibly Mohs scale for hardness.
To find the volume of a pencil, you can approximate it as a cylinder. Measure the diameter of the pencil to find the radius, and then measure its length. Use the formula for the volume of a cylinder, ( V = \pi r^2 h ), where ( r ) is the radius and ( h ) is the height (length of the pencil). Calculate the volume using these measurements.
You could use either centimeters or millimeters, but probably centimeters.
Depending on the size of it id say either a 15cm ruler or a 30cm ruler.
a ruler