Briefly describe Millikan’s oil drop experiment and what do the results tell us about electric charge.
In: Physics
For Exercises explain how each experiment can be simulated by using random numbers.
Two players match pennies.
In: Statistics and Probability
In: Physics
Reynolds Experiments
Aim- The aim of the experiment is to investigate different flow regimes in pipe and find critical Reynold number
In: Civil Engineering
In an experiment, 11.5 grams of NO2 gas are placed in a container at 30.00°C and 1.26 atm. What is the density of the gas?
In: Chemistry
Determine the initial concentration of Al in experiment #4. Include your units. 4 Al(g) + 3 O2(g) ⟶ 2 Al2O3(g)
| Experiment # | [O2]i, M | [Al]i, M | Initial Rate of Reaction, M/sec |
| 1 | 0.10 | 0.20 | 4.80 x 10-3 |
| 2 | 0.30 | 0.20 | 4.35 x 10-2 |
| 3 | 0.30 | 0.40 | 8.70 x 10-2 |
| 4 | 0.20 | ? | 1.95 x 10-2 |
| 5 | 0.15 | 0.30 |
In: Chemistry
Nando performs experiments mixing ice at −5 ◦C and water at 40 ◦C. If you put a certain mass of ice and a certain mass of water, you notice that the final temperature is 0 ◦C and all the ice melts; If you now increase the mass of ice you used in the previous experiment by two kilograms (keeping the temperatures the same) and use the same mass of water, the final temperature is still 0 ◦C, but now all the water is frozen. Determine the two mass values that Nando used in the first experiment
In: Physics
Referring to your experiment; if your first component that eluted with hexane was completely off, but you still had hexane at the top of the column, is it permissible to add the hexane-methylene chloride mixture? If so, why?
**I know it is not permissible because it would not be diserable, just looking for an explanation why.
Details: It was a Column Chromotography experiment. Three solvents are used: 1) hexane; 2) 1/1 hexane/methylene chloride; 3) 9/1 methylene chloride/methanol. Began eluting with hexane, then changed to solvent 2 and then 3.
In: Chemistry
Must show work
H2(g)+ O2(g)→ 2H2 O(g)
How many grams of water will be produced if there 5.0 gram of oxygen?
How many moles of water will be produced if there are 2.0 moles of hydrogen?
You conducted the above experiment in the lab and found that the 10.0 moles of water are produced, how many grams you actually produced of water?
If you correctly done number 3, then it is your yield?
If you started out the experiment with 10.0 grams of oxygen, then calculate the percent yield?
In: Chemistry
In an early translational experiment, a cysteine already attached to its tRNA was chemically converted to an alanine. These “hybrid” tRNA molecules were then added to a cell-free translation system from which the normal cysteine-tRNAs had been removed. When the resulting protein was analysed, it was found that alanine had been inserted at every point in the polypeptide chain where cysteine was supposed to be. Discuss what this experiment tells you about the role of aminoacyl-tRNA synthetases and ribosomes during the normal translation of the genetic code.
In: Biology