2nd Grade Science: Which Battery Is Better?
Which Battery Is Better?
Amber Hess th 6 Grade Science
Mrs. Garmon
1 March 1999
CONTENTS
Abstract ……………………………………………………………………………………..1
Question……………………………………………………………………………………..1
Variables…………………………………………………………………………………….1
Hypothesis…………………………………………………………………………………..2
Background Research ………………………………………………………………………2
Materials List ……………………………………………………………………………….4
Experimental Procedure …………………………………………………………………….5
Data Analysis and Discussion ………………………………………………………………6
Conclusions ………………………………………………………………………………….7
Acknowledgements ………………………………………………………………………….7
Works Cited ………………………………………………………………………………….8
Hess 1
Amber Hess
Mrs. Garmon th 6 Grade Science
1 March 1999
Which Battery Is Better?
Abstract
Advertisers are always touting more …show more content…
The dry cell works like the cell invented by the French engineer Georges Leclanche in 1865. His cell had a liquid electrolyte, but in the modern version the electrolyte is ammonium chloride paste (DK Science 150). Ordinary dry cells are used in most flashlight batteries. These dry cells use ammonium chloride as the electrolyte. "Cells needed to supply heavier currents use zinc chloride. Alkaline cells, which last longer and can supply even heavier currents, use the alkali potassium hydroxide" (DK Science 150).
Most flashlights take two or more dry cells. Cells are connected in series one after another. Large powerful flashlights may take four or more cells. The size of a cell has no effect on its emf. The chemicals in the cell determine its emf, but large cells last longer than small cells of the same basic type.
Hess 4
How long a battery lasts also depends on how it 's used. Two batteries may last the same length overall but one might maintain higher voltage over more of its lifetime, in a sense providing better quality. A high powered device such as a motorized toy running constantly takes more current than a less power hungry device such as a personal stereo that alternately …show more content…
1. Graph of voltage vs. hours of battery use in flashlights for three brands of batteries.
[Note: This graph is one of three that the student prepared.]
Hess 7
According to my experiments, the Energizer maintained its voltage (dependent variable) for approximately a 3% longer period of time (independent variable) than Duracell in a low current drain device. For a medium drain device, the Energizer maintained its voltage for approximately 10% longer than Duracell. For a high drain device, the Energizer maintained its voltage for approximately 29% longer than Duracell. Basically, the Energizer performs with increasing superiority, the higher the current drain of the device.
The heavy-duty non-alkaline batteries do not maintain their voltage as long as either alkaline battery at any level of current drain.
Conclusions
My hypothesis was that Energizer would last the longest in all of the devices tested. My results do support my hypothesis.
I think the tests I did went smoothly and I had no problems, except for the fact that the batteries recover some of their voltage if they are not running in something. Therefore, I had to take the measurements
Amber Hess th 6 Grade Science
Mrs. Garmon
1 March 1999
CONTENTS
Abstract ……………………………………………………………………………………..1
Question……………………………………………………………………………………..1
Variables…………………………………………………………………………………….1
Hypothesis…………………………………………………………………………………..2
Background Research ………………………………………………………………………2
Materials List ……………………………………………………………………………….4
Experimental Procedure …………………………………………………………………….5
Data Analysis and Discussion ………………………………………………………………6
Conclusions ………………………………………………………………………………….7
Acknowledgements ………………………………………………………………………….7
Works Cited ………………………………………………………………………………….8
Hess 1
Amber Hess
Mrs. Garmon th 6 Grade Science
1 March 1999
Which Battery Is Better?
Abstract
Advertisers are always touting more …show more content…
The dry cell works like the cell invented by the French engineer Georges Leclanche in 1865. His cell had a liquid electrolyte, but in the modern version the electrolyte is ammonium chloride paste (DK Science 150). Ordinary dry cells are used in most flashlight batteries. These dry cells use ammonium chloride as the electrolyte. "Cells needed to supply heavier currents use zinc chloride. Alkaline cells, which last longer and can supply even heavier currents, use the alkali potassium hydroxide" (DK Science 150).
Most flashlights take two or more dry cells. Cells are connected in series one after another. Large powerful flashlights may take four or more cells. The size of a cell has no effect on its emf. The chemicals in the cell determine its emf, but large cells last longer than small cells of the same basic type.
Hess 4
How long a battery lasts also depends on how it 's used. Two batteries may last the same length overall but one might maintain higher voltage over more of its lifetime, in a sense providing better quality. A high powered device such as a motorized toy running constantly takes more current than a less power hungry device such as a personal stereo that alternately …show more content…
1. Graph of voltage vs. hours of battery use in flashlights for three brands of batteries.
[Note: This graph is one of three that the student prepared.]
Hess 7
According to my experiments, the Energizer maintained its voltage (dependent variable) for approximately a 3% longer period of time (independent variable) than Duracell in a low current drain device. For a medium drain device, the Energizer maintained its voltage for approximately 10% longer than Duracell. For a high drain device, the Energizer maintained its voltage for approximately 29% longer than Duracell. Basically, the Energizer performs with increasing superiority, the higher the current drain of the device.
The heavy-duty non-alkaline batteries do not maintain their voltage as long as either alkaline battery at any level of current drain.
Conclusions
My hypothesis was that Energizer would last the longest in all of the devices tested. My results do support my hypothesis.
I think the tests I did went smoothly and I had no problems, except for the fact that the batteries recover some of their voltage if they are not running in something. Therefore, I had to take the measurements