For the hydrogen atom, the transition from the 2p state to the 1s state is accompanied by the emission of a photon with an energy of 16.2×10-19 J. For a C atom, the same transition (2p to 1s) is accompanied by the emission of x-rays of wavelength 44.7 Å. What is the energy difference between these states in carbon?
J
The energy difference between these states in
carbon is _________larger than smaller than about
the same as the corresponding energy difference for hydrogen.
The energy difference between these states in
oxygen would be expected to be _________larger
than smaller than about the same as the corresponding energy
difference for carbon.
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In: Chemistry
A recent article in the Huffington Post talks about New York Governor Cuomo’s recent executive order mandating that police remove homeless people from the streets when the temperature goes below freezing http://www.huffingtonpost.com/entry/andrew-cuomo-homeless-freezing-temperatures_5689d677e4b0b958f65c0100 . Does this violate people’s rights? Does the state have the responsibility to do this, or is this overreach?
What about the panhandlers on every corner in Worcester. The state supreme court has ruled it a violation for the city to restrict them --how come we (society) are enablers of mentally ill and alcohol/drug addicted people?
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Ms.Watts is a fan of college football, and is a little bummed the Texas Longhorns haven’t been doing as well these past few years. She has a hunch that because The Longhorns are in the highest collegiate athletic division (Division-I), her team is more likely to play a mismatched opponent. That is, The Longhorns are more likely to play games with different point spreads (winning team’s score minus losing team’s score) compared to other Divisions. To test this idea, she looked at a sample of 4 games from a lower division (Division-II) to see if the mean point spread was different compared to The Longhorns’ Division-I group. Overall, Division-I teams had a mean spread of 16.189 points with a standard deviation of 12.128 points.
1. The results of the four Division-II games from Ms. Watt's sample are below. Calculate the mean point spread for this sample.
| Team 1 / SCORE | Team 2 / SCORE | Point Spread (T1 Score - T2 Score) |
| Holy Cross / 27 | Bucknell / 10 | |
| Lehigh / 23 | Colgate / 15 | |
| Lafayette / 31 | Fordham / 24 | |
| Georgetown / 24 | Marist / 21 | |
| MEAN |
2. Calculate the standard error.
3. State the null hypothesis based on what Ms.Watts believes about mean point spreads in Division-I compared to Division-II football games.
4. State the research hypothesis based on what Ms.Watts believes about mean point spreads in Division-I compared to Division-II football games.
5. Calculate the z-statistic to test the hypothesis you formulated in Questions 3 & 4 using the mean point spread for Division I as the comparison population to the mean point spread you calculated for #1.
6. Given the convention of p<.05, what can you conclude about the mean point spread found in Division-II compared to the mean point spread in Division-I teams? First, make a decision regarding your hypothesis, then state your conclusion.
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