yellow?
The "number 2" designation refers to the "hardness" of the lead. The higher the number, the "harder" The "7mm" designation refers to the "thickness" of the lead. The higher the number, the thicker. They are not the same pencil.
The number of the pencil is based on the type of carbon lead used inside. The thicker the carbon lead gets the higher the number of the pencil becomes. If you notice a mechanical pencil is 0.9mm in diameter so it would be called a #0.9 pencil. A #2 pencil's lead is 2mm in diameter. So Why would we call a pencil a #3 pencil? Because it's lead is 3mm in diameter.
yes they are called pen pencil or mechanical pencil. you have to click it like a pen for the led to come out
ruler
Yes!!!
A regular pencil is considered an instrument, a mechanical pencil may be considered a simple machine , in that it has moving parts that rotate, and move up and down.
no
yellow?
The mechanical pencil is more earth friendly because to get regular wood pencils,you have to cut down trees. (wood=trees Duhh)
a number two pencil is made of wood with graphite in the center of it
There are quite a number of various places where one can order refills for a cross mechanical pencil. Some of these are at Staples and at Sam's Club.
Yes ,as long as it has number two lead.
The "number 2" designation refers to the "hardness" of the lead. The higher the number, the "harder" The "7mm" designation refers to the "thickness" of the lead. The higher the number, the thicker. They are not the same pencil.
A mechanical pencil is just about the same size as a normal pencil, about 6 inches long.
you can't
Mechanical energy from your hand is converted into rotational mechanical energy to turn the blade inside the pencil sharpener. This rotational mechanical energy is then used to shave and sharpen the pencil, converting mechanical energy into potential and kinetic energy of the pencil shavings.