3 March 2018

We used each metal 3 times, because when we heat each one of them and time them, we will find the average from the 3 different timings, so the results will be more reliable. Dependent: The time Each one of them will take different timings to fall, because each metal will take a specific time to pass the heat from 1 particle to another. Controlled: The distance The distance from the Bunsen burner till the end of the metal where the pin is placed.

The distance was CM every time we placed the metals on the tripod over the Bunsen burner.The position of the Bunsen burner The position of the Bunsen burner under the tripod was always the same hen we put the metal over them, and the best way to make sure that its always the same, was not to move the Bunsen burner, and just change the metals when we needed to. Method Equipment list: 1- 3 rods of Steel 2-3 rods of brass 3-3 rods of copper 4_ Tripod 5- Bunsen burner 6- Stop watch 7- Heat gloves 8- Lab coat 9- Goggles 10- Pen and a paper 11- 9 Pins 12- Wax from a candle 13- Matchsticks Steps-Procedure: 1- Bring all the equipments you need for the experiment then wear your lab coat, goggles and the heat gloves. – Light up a candle, and then stick 1 pin on the end of each metal (Copper, brass and steal) by using the wax from the Andre. 3- Place the 3 rods of the same type of metal on top of the tripod and put the Bunsen burner under it. Then open the Bunsen burner on a safety flame and on the blue flame. Start the stop watch at the same time, and stop it when the pin falls.

## Believe in your dreams Essay Example

After you observed what happened, write the results on the paper, which includes the time it took for each pin to fall off from each rod. Don’t forget that the Bunsen burner should be CM away from the pin. ) 4- Repeat step 3, but using the other 2 types of metals. Don’t forget to write your results after that. 5- After you finish, turn off the Bunsen burner. Then mind the average of the timings of each metal. Table: Metal Time (sec) Average First record Second record Third Record Steel 48 54 56 53 Brass 12 25 26 21 Copper 19 20 11 17 Conclusion: The hypothesis was correct.

The heat transferred through all the metals, but each one of them took different timings.Copper was the fastest between them and brass was the second, and the steel took the longest, because when the heat reached the particles of the rod, it took longer than the others for the particles to vibrate, till the whole rod is hot. None of them took longer than 1 minute. From this experiment I learned that heat transfers through efferent metals in different ways. Evaluation: think my results were almost reliable. Heated 3 rods of the same type of metal each time. I timed each one Of them, and then found the average, this will make my results more reliable.

I think heating 3 rods for each metal is quite enough, maybe if we did more, of course it’ll be more accurate. In this experiment I only used 3 metals. I think its fine, but it would be better if we used more types of metals if possible. The timings were not really accurate because the 3 rods were next to each other, so when the wax melted, which slowed down the pins to fall, and that affected my results. Now I know that steel conducts heat faster than copper and steel.I think my variables were good, and valid, for the independent (things I changed) were the metals, which is the only thing should change in this experiment. For the Dependent (things I measure) which was the time it took for the pin to fall off as the heat is transferred through the metal.

And also theses the only thing would measure. As for the controlled (things kept the same) which were the positions of the Bunsen burner and the distance from Bunsen burner until the pin. I could have improved some stuff to make the experiment treatable and more reliable.Problem Solution Amount of wax The amount of wax that was placed on the rod to stick the pin on it, wasn’t always the same, and if there’s a lot of wax, it’ll take more time for it to melt and my results won’t be accurate. The place of the rods on the tripod We put all the 3 rods of the same type of metal on the tripod at the same time; we put them right next to each other, which makes the pins over each other, which will stop them to fall, even if the wax melted. Of course that will affect the results. The only way to fix that is to do every rod alone, but we couldn’t do that, because we didn’t have enough time in class.

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