You purchased more expensive lab equipment Quantities measured with the expensiv

Question

You purchased more expensive lab equipment Quantities measured with the expensive equipment a. will have no measurement error b. will have measurement error the same as the cheaper equipment c. will have measurement error more than the cheaper equipment d. will have measurement error more than the cheaper equipment because measurement error increases with precision of measurement e. will have measurement error less than the cheaper equipment In a lab experiment, you measured 5000 values of position (y) and corresponding time (t) for an object dropped from rest. The best way to report your observations of the experiment is: a. to provide a printout of y and t data. b. to provide an equation derived from two pairs of observations. c. to provide a digital copy of all the observations. d. to provide a plot of y and t on a simple graph paper. e. to provide the calculated value of the variable for which the experiment was designed for. In the experiment of Question 2, assume that the theoretical relationship between y and t can be expressed as y = y_0 + 1/2 gt^2, where y_0 is the initial position of the object, and g is a constant. A position-time graph plotted on a simple graph paper with y along y-axis (positive upward), and t along x-axis (positive to the right) will be a. a straight line that must pass through origin b. a straight line that may or may not pass through origin c. a curve sloping upward d. a curve sloping downward e. may be a straight line or a curve depending on the value of y_0. Using observations from the experiment of Question 2, the value of g can be found graphically: a. by plotting y and t on a simple graph paper and finding the slope of the line. b. by plotting y and t^2 on a simple graph paper and finding the slope of the line. c. by plotting y^2 and t^2 on a simple graph paper and finding the slope of the line d. by plotting y^2 and t on a simple graph paper and finding the slope of the line e. Cannot be found graphically

Explanation / Answer

1) e: they will have less error but error can never be zero.

2)d: plot will represent the all the data in a simple way.

3)c: it will be upward opening parabola

4)b: y: 0.5gt^2 + yo. clearly the graph has to be between y and t^2

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