Scale
wedge
Inclined plain
The axe head is a wedge, which is really two inclined planes. The handle is a lever with the fulcrum at the base, load at the end (the head) and force somewhere in between depending on where you place you're hands.
A stearin engine is a simple machine that uses its wax to create power ( or other output of mechanical energy). I see you have found those IYPT questions aswell!!!
The efficiency of a machine is found by considering the useful energy or work that comes out of it, and dividing this by the work that you put into it. Multiply by 100 to get the answer in terms of percentage. You should never get more than 100% efficiency, or 100%, since energy will be lost (to heat caused by friction for example).
Common and simple tessellations may be found in a tiled bathroom, or wooden floor-boards.
A nightlight, nail polish and a nail file are found in the bathroom. Nylons, Neosporin and No-Doze are found in the bathroom.
Zipper (on the pants on the floor in the bathroom)
Elvis was found on the floor in his suite's bathroom.
The wheel and axle simple machine and the lever simple machine are both found in typewriters.
Elvis was found on the floor of his bathroom in Graceland sometime after his death.
fan,floor mat,floss,fingernail clippers,
wedge
wedge
What type of simple machine is found on a water bottle cap? lever wheel and axle pulley screw
Information about bathroom floor tiles can be found at your local Lowe's or Home Depot. Alternatively, such information is also available online on the official website for the company "The Tile Shop."
Inclined plain