An electric iron is used to remove wrinkles from clothing. the electric iron is made of metal. which property of this substance is most useful for this application? boiling point density electrical conductivity thermal conductivity

Thermal conductivity.

Explanation: In the iron, a piece of metal is heated up, and you put this on top of clothes in order to heat the clothes and remove the wrinkles in it.

Then, the thing that is useful here is amount of heat that the iron transmits to the thing that it touches, and this is directly related to the thermal conductivity, that tell us "how much heat a given material absorbs or transmits (in this case, the metal is hot and the clothes are cold, so the metal piece is transmitting heat)"

Then the correct option is the thermal conductivity

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

found in the nucleus

has mass of one amu