Why when you use fire heat the bi-metallic strip it will bend?

Question

Can you tell me Why when you use fire heat the bi-metallic strip it will bend?

Answer 1

The bi-metallic strip will bend if each of the parts of the strip are made of metal which expand a different amount when heated. Every metal expands when heated, but the amount that it expands depends on the type of metal. If one side of your strip expands more than the other side, it will have to bend or fall apart.

Answer 2

The previous answer is correct. The practical uses for this is many and varied. What I mostly see is a bi-metallic switch inside an electric motor. If the motor gets too hot then the switch opens and either breaks the contact for the hold in circuit or allows a warning to go off. They are used in home thermostats. The spring thing in your mercury thermostat is a bi-metallic strip.

Have you ever seen the video of the "psychic" bending a fork with a touch? The fork has a very malleable bi-metallic make-up that will bend with the heat of a finger.

Answer 3

in the beginning timber is extremely undesirable conducton of warmth. ITS COEFFICIENT OF THERMAL enlargement is likewise VERY LOW. that's extremely diffficult to make skinny strips to be joined to type "biwoodden strip". returned it may no longer stand up to severe temperature.-it is going to initiate burning. Bimetal strips bend at the same time as heating, yet 'biwoodden' strip would possibly no longer bend yet burn. It fairly breakes too.. Now, concerning an investigatory project : Take different rods of different components. placed wax drops (from candle) on the rod at equivalent distances-say a million inch hollow.restoration paper pins on each and every drop. warmth one end of the rod Slowly warmth would be carried out from one end to the different. while the temperature will advance at the same time as warmth circulate the candle drops will initiate melting and the pins falling. this means the warmth skill is being carried out from one end to the different. notice down the time taken for the circulate of warmth skill by conduction. Repeat the expeiment with different rods of different fabric, thickness, with different flames etc and evaluate by plotting time-distance graph. i've got self belief that's an rather sturdy project on "Thermal Conductivity" of fabric. Please try & fulfill your self.