1. Yes, it makes sense to plot results from a titration curve. The plot will indicate the inflection point, which in this case should occur at neutral pH.
2. One sentence can tell the story quite clearly. Why plot something that hardly changes?
3. Yes, send them a graph. Daily reports, such as closing values for a stock index or changing weather data, lend themselves well to visual representation.
4. Yes, you could plot the data, choosing a plot type carefully.
5. Yes, because a graph enables you do visually spot periodic dips in light intensity over time.
6. No. If friction significantly affects the motion of the steel ball, it will be to slow its acceleration and instantaneous velocity. It will take more time to reach point B than Newton's laws of mechanics predict. All you need to measure is the travel time from point A to point B. If you wanted to know if the coefficient of friction is the same all the way down the incline, you would then plot the data.
1. For the titration curve (previous question 1) which is the independent variable?
pH
volume of alkalai
2. For the previous question 3 about reporting precipitation, which variable is dependent?
inches of rain
day of the month
3. For the previous question 4, the animal diet study, which variable will you plot on the y axis?
mass
group
4. For the "planet hunting" study (previous question 4), which variable will you plot on the x axis?
light intensity
time (hours)
5. When a small inoculum of bacteria is placed in liquid growth medium, a typical culture displays several phases of population density. We see a lag phase, that is a delay before the population begins to increase, followed by an exponential increase in population as bacteria reproduce by binary fission. A stationary phase with constant cell numbers follows the exponential phase, and is in turn followed by a death phase due to nutrient depletion and waste buildup. When you plot the data which variable will be the dependent variable?
time (hours)
concentration of living cells
*6. Temperature affects bacterial growth differently for different species. Some species grow fastest at 25C, some grow best at 30C, and some grow best at 37C. Which would be a dependent variable?
temperature
time to reach half maximum population density