Physics Conclusion – balances

By using three devices, the platform balance, electronic scale, and the inertia balance it is possible to defy the relationship between mass and weight. The mass of an object relates to the amount of matter there is present. On the other hand, gravity is referred to as the pull or force of an object to the Earth. The platform balance and electronic scale are balances that require gravity to “pull” or have a force on the objects being measured to obtain its mass. The mass measuring device that would work in the absence of gravity is the inertia balance. It is this device that collaborates the period observed and the masses obtained from the electronic scale. It would be sufficient to use in the absence of gravity because it moves horizontally, instead of requiring a vertical force to carry out its purpose. The electronic scale is the most precise measuring tool used in the experiments. This is justified by having a range of masses for each clamp between .0943kg and .1034kg when measured on the electronic scale. It is also the most precise because it can measure to the same decimal point each time. The platform balance would not be a precise measuring device since there could be many interpretations of measurements. The measuring is very tedious and easy to miscalculate. The inertia balance is also not very precise. It is a very general way of measuring the period in part two for it is difficult to concentrate on 20 fast moving vibrations.

After experimentation, the observations were found to be very accurate for part one. The mean of .297kg was calculated to have a 0% relative deviation when compared to the observed mass, .297kg. The preciseness of the electronic scale is shown through the masses of each object throughout the nine groups. All of the masses are very precise to each other. The relative deviations of all three objects are found to be very precise by having 0% Dr, .916% Dr, and .069131% Dr.

In experiment three, the observed volumes and masses were very accurate to the accepted measurements of the nine objects. By using the derived equation D=M/V, it is found that all but one experimental mass density was accurately measured to the accepted mass density.

he graph shows a direct relationship between t^2 and m; as t^2 increases m increases as well. This data can be used to plot the points as additional clamps were added to the inertia balance and the time^2 recorded to perform 20 vibrations. The masses of the clamps located on the absicissas (x – axis) and the periods squared as ordinates (y – axis), were plotted and a best fit line was incorporated into the graph. The time squared (observed time^2) of the unknown mass was used to interpolate its mass. The interpolated mass was found to be .230kg (observed). The accepted mass of the unknown is .304kg.

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