Mystery Box Lab Report

There are several sources of error to this experiment due to random and systematic errors. The only source of random error was the measurement that we took through the graduated cylinder which was only accurate to the nearest 1%. We took the largest error from this one percent, which was +/- 3. The largest relative error this yielded was only 3%, so this did not affect how precise this experiment was too much. We can still make this more precise by making the masses of the water larger. For example if we started the masses at 300mL and went up by 50mL, the largest error this would yield would be 2% due to the largest error being +/- 5. This would cause smaller errors in the amount of water.

However, the results are completely different. The results shown in the table, the water and cornstarch solution is most suitable liquid to use in the snow globes due to its thick viscosity compared to other solutions. Hence, the marble traveled slower as it created more drag onto the marble. Nevertheless, the water itself had low viscosity compared to other solutions because the marble reached the base faster of the measuring cylinder. As a result, it created less drag onto the marble compared to water and cornstarch solution. Therefore, the thicker the solution, the longer it takes for the marble to reach the base of the measuring cylinder. However, if the solution has low viscosity (such as water itself), the faster it the time it takes for the marble to reach the

After completing this experiment, our tap water hypothesis was correct, and our saltwater hypothesis was also proven. For the tap water, the gummy bear expanded as we thought it would. This was because of osmosis. The water outside of the bear diffused into the bear from the higher concentration outside into the lower concentration inside of it. The gummy bear was a selectively permeable membrane. This made a hypotonic solution, and the water rushed into the bear, making it get bigger. For the salt water, the bear shrunk as we predicted, also because of osmosis. This was a hypertonic solution, so the water rushed out of the bear, making it smaller. So our hypothesis for both tap and salt water were correct. We carried out the experiment properly

Vial number one had trouble staying down but my group held it under until finally they were able to get it to stay underneath the water. The rubber band could now be removed from the tray. The respirometers were in the water for a timed three minutes to allow them to equilibrate. After the three minutes was up the initial level of oxygen that entered the pipet was recorded in our lab books. After this data was found and recorded we were finally able to begin the actual experiment testing.

the stopcock to release the pressure. Close the stopcock, shake the funnel several times, and again release the pressure through the stopcock (see Technique 12, Section

funnel add approximately one quart less than the recommended amount. Now it's time to replace

Fill a test tube about 1/3 full with cold tap water for use in step 34.

The experiment performed was Experiment IV: Fluid Flow Meters and Tray Hydraullics. The group was composed of Alex Long, Khanh Ho, Tricia Heitmann and myself. The first day of

Dispense .5 mL water into the already weighed conical vial, replace cap and face insert on its down side.

My favorite scents would have to be the smell of dew after a strong rain, or perhaps the smell of fog. They both give off a similar feeling of mystery and calmness, a calm after the storm. It’s a smell that’s cold as metal, yet can bring you to the rolling hills of Ireland, or to a tropical tsunami in Asia. Just in the presence of it, I have the image of a calm field filled to the brim with mist, unable to see beyond the length of my arm. It’d be night, with a full moon high in the sky, but not one with apprehension, but rather one of just sleepiness and a desire to rest.

1. Fill the graduated cylinder nearly to the top with water, with a tall glass tube open at both ends (the water level with act as the closed end).

Record the height of the bubbles in a table every minute until the stopwatch reaches 5 minutes.

The Macbeths’ marriage, like the couple themselves, is abnormal, particularly by the standards of its time. Yet despite their odd power dynamic, the two of them seem surprisingly attached to one another, particularly compared to other married couples in Shakespeare’s plays, in which romantic luck appears mainly during courtship and marriages tend to be troubled. Macbeth offers an exception to this rule, as Macbeth and his wife are partners in the truest sense of the word. Of course, the irony / mockery of their “happy” marriage is clear—they are united by their crimes, their mutual madness, and their mounting alienation from the rest of humanity.

The amount of water used in the micro-test tube was measured until it was exactly 1cm from the top of the test tube.

Firstly, use a longer delivery tube. Having a fairly short delivery tube meant that it was sometimes complicated to weave it effectively through the beehive shelf. Subsequently, the tube and beehive shelf both had to be held down. The problem that occurred was that the tube would suddenly come out of the beehive shelf while the reaction was taking place meaning that particular trial had to be restarted. Another recommendation would be to use a retort stand and clamp to secure the test tube. This would make it easier to conduct the experiment as it would become more ‘hands free’. This experiment would be more effective if the test tube did not have a spout. This would make it easier to measure the amount of water after the reaction as it would not escape. It would have been useful to use a hard, flat object to place over the rim of the test tube so that no water would escape when measuring it after the displacement reaction occurred. Another recommendation would be to test the experiment by conducting some test runs. This would ensure ultimate accuracy when the actual experiment takes place. Some of the previously mentioned difficulties could have been resolved before the experiment if there were some practises conducted first. If the scientist wanted the experiment to speed up then a Bunsen burner could easily be added in to the design. The heat from the flame would raise the