Did your prediction of the what tube would give the fastest and slowest flow rate turn out to be correct after performing the experiment? If not, why were you surprised? (if you have not performed the experiment, make a prediction based on what you learned in the lecture how flow rate is affected by the radius of a tube and then watch the video of the experiment on vUWS labelled bucket_flow rate).
What implications could this important concept and physics principal have in “real life” applications – list as many as you can think of where this concept applies or is used.
What implications does this important concept have in physiology?
What other physical characteristic of a fluid would influence the flow of a bodily liquid such as blood? How would it influence flow and why?
In: Physics
Consider the following experiment: a double-slit set-up for firing electrons one at a time. Let's now add a second electron (orange), which is fired parallel to the first one, but in the opposite direction, and so as to pass closer to one slit than the other, and, importantly, above the plane in which interference occurs:
The firing of the two electrons is timed so that the orange electron is "closest" to the purple electron somewhere around point P, i.e. after the latter has passed through the two slits.
Presumably the electrons will repel due to having charge. Presumably an interference pattern will still be produced by the purple electron if the experiment is repeated thousands of times.
Now my question is, how exactly does the orange electron get deflected? If the experiment is repeated, would it always hit the same point on the opposite wall, or would it also start producing a sort of an interference pattern?
In: Physics
A dice problem. Suppose there is a 3-sided die whose equally likely outcomes are 1,2 and 3 after it is thrown. (A 3D object with equilateral triangle cross-sections and rounded sides might work in practice.) We have three such dice, one orange, one black, and one red. They are all put in a cup, shaken, and tossed onto a table. (a) How many elementary events (individual outcomes) are there for this experiment? (b) Write out the sample space for this experiment. (c) What is the probability that all the dice show odd numbers? All even numbers? (d) Find the probability that the sum of the three dice is 4. Do the same for sums of 8 and 9. (e) Which sum of the three dice is the most likely?
Suppose no 3 sided dice are available. How could we perform the experiment in problem 2 with regular 6-sided dice? Be careful here!
In: Statistics and Probability
Thermodynamics:
Two experiments with a monatomic ideal gas were done. See data table for more information.
Initial conditions for both:
Volume:1.62L
Temperature: 600K
Pressure: 3.25 atm.
Was experiment performed in a one step process either isothermally or adiabatically? Or was it done in a combination of both isothermal and adiabatic steps? Please give calculated proof.
Could either experiments been done in a completely reversible manner?
Please also calculat the final conditions of volume and pressue of the gas for both experiments based on final temperature.
Data:
Experiment 1:
W = -3.83 * 10^2 J
Q = 0
ΔSsys (J/K) = 9.26 * 10^-2
Final temp: 313K
Experiment 2
W = -8.08 * 10^2 J
Q = 3.80 * 10^2
ΔSsys (J/K) = 6.33 * 10^-2
Final temp: 279K
In: Chemistry
hello, i'm writing a lab report on gravimetric sulfate experiment. Ba2+ + SO4 2- -> BaSO4. disolved in HCL. Can someone please kindly help twith the experiment introduction and background by answerig these questions?? it's instruction from my instructor. I greatly appreciate.
" Explain the theory of gravimetric analysis and ionic precipitation, as it applies to this sulfate experiment. Be sure to include the reaction equation, a mention of Ksp and solubility of the precipitate, excess precipitant & Le Chatalier's principlem crytal growth vs nucleation, digestion, coprecipitation (adsorption, inclusions, occlusions), quantitative wash/rinse/transfer, peptization and why you are able to use hot water to rinse instead of an ionic solution, filtration, decantation, ignition to constant mass, effect of ahless vs. regular filter paper, and how the calculation for weight percen analyte is made."
Thank you very much!!!!
In: Chemistry
1) Define the Triboelectric Series and based on your data determine it for the White, Blue and Al charge producers/proof plane.
2) How does this experiment verify Gauss's Law
3) Who is the mathematician that first related conservations laws and symmetry in physics? Write a paragraph on this person using correct citation for references
4) What is the symmetry that is related to charge conservation? use correct citation for references
5) What does the Faraday Ice Pail experiment tell about charge induced on a conducting shell?
6) What does the Faraday Ice Pail experiment tells about the total E field inside a hollow conducting shell if there is charge outside but no charge inside the hollow portion ?
7) How can the answer to question to the previous question be used to create a field free room to house very sensitive electronic measuring equipment?
In: Physics
Anyone answer the 3 questions?
Experiment:
Tie one end of the fishing line to a chair.
String the other end of the fishing line through the straw and tie the line to a 2nd chair spaced ft. away.
Inflate the balloon. Hold it closed with your fingers, and tape it to the straw.
Slide the straw/balloon back so that the mouth of the balloon is facing the nearest chair.
Let go of the balloon and observe what happens.
Questions:
1. Explain what caused the balloon to move in terms of Newton's 3rd Law.
2. What is the force pair in this experiment? Draw a free body diagram (FBD) to represent the unbalanced) forces on the balloon/straw combination.
3. Add some mass to the straw by taping some metal washers to the bottom and repeat the experiment. How does this change the motion of the assembly? How does this change the FBD?
In: Physics
List the characteristics of a multinomial experiment. (Select all that apply.)
The number of successes is evenly distributed over all k categories.
We are interested in x, the number of events that occur in a period of time or space.
The trials are independent.
The experiment consists of n identical trials.
Its mean is 0 and its standard deviation is 1.
The outcome of each trial falls into one of k categories.
The experiment contains M successes and N − M failures.
The probability that the outcome of a single trial falls into a particular category remains constant from trial to trial.
The probability that the outcome of a single trial falls between two categories is equal to the area under the curve between those categories.
We are interested in x, the number of successes observed during the n trials.
The experimenter counts the observed number of outcomes in each category.
Each trial results in one of only two possible outcomes.
In: Math
A student carried out the experiment "Ways to Express
Concentration" and obtained the following data expressed in the
table.
used solute and molar mass: NaCl (58.44 g / mol)
volume and concentration aqueous solution originally prepared:
500.00mL 2.50M
Empty tube mass: 147.85g
Tube mass with solution: 150.95g
Tube mass with residue: 149.03g
volume of solution used: 2.000mL
1. Residual mass?
2. Mass solution?
3. Solvent mass?
4. Moles of solute?
5. Moles solvent?
6. The calculated molarity of the solution is:
7. The molar fraction of the solvent is:
8. The percent by mass of solute is:
9. What are the colligative properties?
10. What were the substances used in the "Descent in Melting Point"
experiment?
11. How is molar mass determined from data from a melting /
freezing drop experiment?
In: Chemistry
OBSERVATIONS
| Trial | Right Cell Metal | Right Cell Solution | Left Cell Metal | Left Cell Solution | Total Voltage |
| #1 | Lead | 4 mL of 0.1 M Lead Nitrate [Pb(NO3)2] | Copper | 40 mL of 0.1M Copper Nitrate [Cu(NO3)2] | 0.47 v |
| #2 | Lead | 4 mL of 0.1M Lead Nitrate [Pb(NO3)2] | Silver | 40 mL of 0.1M Silver Nitrate [AgNO3] | 0.90 v |
| #3 | Lead | 4 mL of 0.1MLead Nitrate [Pb(NO3)2] | Platinum | 20 mL of 0.1M Iron III Sulfate [Fe2(SO4)3] & 20 mL of 0.2M Iron II Sulfate [FeSO4] | 0.91 v |
| #4 | Copper | 4 mL of 0.1M Copper Nitrate [Cu(NO3)2] | Silver | 40 mL of 0.1M Silver Nitrate [AgNO3] | 0.43 v |
| #5 | Copper | 4 mL of 0.1M Copper Nitrate [Cu(NO3)2] | Platinum | 20 mL of 0.1M Iron III Sulfate [Fe2(SO4)3] & 20 mL of 0.2M Iron II Sulfate [FeSO4] | 0.44 v |
| #6 | Silver | 4 mL of 0.1M Silver Nitrate [AgNO3] | Platinum | 20 mL of 0.1M Iron III Sulfate [Fe2(SO4)3] & 20 mL of 0.2M Iron II Sulfate [FeSO4] | -0.02 v |
| Trial | Right Cell Metal | Right Cell Solution | Left Cell Metal | Left Cell Solution | Total Voltage |
| #1 | Lead | 4 mL of 1.0M Lead Nitrate [Pb(NO3)2] | Copper | 40 mL of 1.0M Copper Nitrate [Cu(NO3)2] | 0.47 v |
| #2 | Lead | 4 mL of 1.0M Lead Nitrate [Pb(NO3)2] | Silver | 40 mL of 1.0M Silver Nitrate [AgNO3] | 0.93 v |
| #3 | Lead | 4 mL of 1.0M Lead Nitrate [Pb(NO3)2] | Platinum | 20 mL of 1.0M Iron III Sulfate [Fe2(SO4)3] & 20 mL of 2.0M Iron II Sulfate [FeSO4] | 0.91 v |
| #4 | Copper | 4 mL of 1.0M Copper Nitrate [Cu(NO3)2] | Silver | 40 mL of 1.0M Silver Nitrate [AgNO3] | 0.46 v |
| #5 | Copper | 4 mL of 1.0M Copper Nitrate [Cu(NO3)2] | Platinum | 20 mL of 1.0M Iron III Sulfate [Fe2(SO4)3] & 20 mL of 2.0M Iron II Sulfate [FeSO4] | 0.44 v |
| #6 | Silver | 4 mL of 1.0M Silver Nitrate [AgNO3] | Platinum | 20 mL of 1.0M Iron III Sulfate [Fe2(SO4)3] & 20 mL of 2.0M Iron II Sulfate [FeSO4] | -0.02 v |
| Trial | Right Cell Metal | Right Cell Solution | Left Cell Metal | Left Cell Solution | Total Voltage |
| #1 | Silver | 4 mL of 0.1M Silver Nitrate [AgNO3] | Silver | 40 mL of 1.0M Silver Nitrate [AgNO3] | 0.06 v |
| #2 | Silver | 4 mL of 0.1M Silver Nitrate [AgNO3] | Silver | 40 mL of 0.1M Silver Nitrate [AgNO3] | 0.00 v |
| #3 | Silver | 4 mL of 0.1M Silver Nitrate [AgNO3] | Silver | 40 mL of 0.1M Silver Nitrate [AgNO3] & 400 mL Water | -0.06 v |
CONCLUSIONS:
1. When comparing the Part 1 and Part 2 data, how did the voltages differ when varying concentrations?
4 of the trials voltage charge remained the same, while 2 of the trials went up in voltage, increased by 0.03 v.
2. Based off your data, what are the standard half-cell potentials for Silver and Iron/Platinum? Explain your reasoning.
3. When comparing your data in Part 3, how did varying the concentration affect the voltage? Which trial had the largest voltage? Which trial had the lowest voltage?
The voltage decreased with each variation. Trial #1 had the largest voltage and trial #3 had the lowest voltage.
4. In the following reactions, determine which element is oxidized and which one is reduced.
- Sn + 4 HNO3 ------- SnO2 + 4 NO2 + 2 H2O
Oxidized Element: Sn ------- SnO2
Reduced Element: 4HNO3 ------ 4NO2
- Mg + Br2 ---------- MgBr2
Oxidized Element: Mg ----- Mg
Reduced Element: 2Br ------ 2Br
In: Chemistry