(Please answer the question based on the movie "The Big Short.". Thank you.)
1.From the movie, what were the major reasons for the 2008 Great Recession?
2. One character specifically blamed a lot of the issues on “big banks”. Do you believe that the big banks are completely responsible for the near economic collapse? Why or why not?
3. What is something that you can personally take away from this movie?
4. What do you think might be the next issue in our economy (not related to COVID 19)?
5. Who was your favorite character and why?
In: Economics
-Suppose you are the owner of a large portfolio of long-term bonds in the health care industry and you believe that in the next three years, all healthcare will be socialized to the public sector. You anticipate that the profits of most healthcare companies will suffer immensely from this new path. If the market agrees with your assessment of the future, what would you anticipate would be the near term consequences for your bond portfolio? Why would this happen and why now, when the change to socialized medicine is three years away? How could you use options on these bonds to guard against lose?
In: Finance
Common terns hover in a stationary position over the ocean watching for a tasty fish. When they see one, they immediately stop their wings and simply free-fall into the ocean to catch the fish. Calculate how long a fish near the surface has to move away after the instant a tern sees it from a height of 3 m above the surface. Repeat Problem above, but now include air resistance. Assume a ball of 3 cm radius with an average density of 4400 kg/m 3 , a density of air of 1.3 kg/m 3 , and a value of C = 1.
In: Physics
Keynes wrote in The General Theory: “If we speak frankly, we have to admit that our basis of knowledge for estimating the yield ten years hence of a railway, a copper mine, a textile factory … amounts to little and sometimes to nothing”
Keynes was not talking about periods of turmoil and crisis when it might be expected that accurate information would be hard to come by; in his view, a state of “near ignorance” was the normal state of affairs.
Discuss Keynes’ concept of “uncertain” knowledge and what it may imply for our ability to measure risk and to invest, both in financial assets as well as in “real” businesses.
In: Economics
At the beach, some waves with wavelength of 100 m propagate towards the shore at a speed of 12.5 m/s. (c) Does the engine sound higher- or lower-pitched to someone standing on the shore, compared with the experience of people on the boat?
(a) Calculate the frequency that boat anchored near shore bobs up and down as the waves roll in.
(b) At what frequency the boat would bob up and down with if it were headed away from the shore at a speed of 4.8 m/s?
(c) At what frequency the boat would bob up and down with if it were headed toward the shore at a speed of 4.8 m/s?
In: Physics
1)The histone proteins of nucelosomes are often abnormally modified in cancer cells, leading to _____. a. an alteration in chromatin structure b. an alteration in levels of transcription c. double-stranded breaks in DNA d. All of the above e. Both a and b
2)
A DNA strand contains the sequence TCGGATGCACCT. A mutation happened that results in the sequence TCCGGATGCACCT. What type of mutation does this change represent?
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a point mutation |
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a missense mutation |
||
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frameshift mutation |
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a silent mutation |
3)
Chromosomal rearrangements might position a gene near heterochromatin. The gene's transcription
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may be inverted. |
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may be amplified. |
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may cease. |
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will turn on. |
In: Biology
In: Accounting
In: Physics
Experiment 2: Static Materials
In this experiment, you will investigate the phenomenon of static
electricity of various materials.
Materials
Electrostatics Kit Materials
*Paper (Any Kind)
*Flat Work Surface
Procedure
1. Tear the paper into small pieces (approximately the
size of a hole-punch) and scatter them in a small area on a table
or flat surface.
2. Choose one plastic strip (acetate [light blue and
transparent], vinyl [no color and transparent], or polyethylene
[white and translucent]) and one fabric (wool or cotton cloth) from
the electrostatics kit.
3. Quickly rub the fabric up and down the length of the
plastic strip for approximately 20 seconds.
4. Bring the plastic strip near the small, torn pieces
of paper.
5. Record observations about the amount picked up and
behavior of the paper in Table 2.
6. Repeat Steps 2 – 5 for five additional fabric and
plastic combinations.
Table 2: Static Electricity Properties of Various Materials
| Type of Plastic | Type of Fabric | Observations |
Post-Lab Questions
1. What happens when you bring the charged plastic strip near the paper pieces? Why does this happen?
2. Draw a free body diagram of the forces acting on the piece of paper.
3. Why does the electric force easily overcome the force of gravity and lift the paper off the surface without even touching the paper?
4. Which of the materials pick up positive charge
and which pick up negative charge? How did you determine
this?
In: Physics
5. Today Van de Graaff accelerators sometimes serve as “injectors” for other types of accelerators that then further increase the energy of the particles. Consider a Van de Graaff accelerator that is being used to accelerate protons. The high voltage terminal (metal sphere) of the Van de Graff is charged using a rubberized belt that is 30 cm wide and travels at a velocity of 20 m/s. Charge is sprayed onto the belt near the roller at the low voltage end and removed from the belt near the upper roller inside the high voltage terminal. The belt is given sufficient surface charge density at the lower roller to cause an electric field of 1.0 MV/m (i.e. approaching the breakdown field of air at atmospheric pressure which is ~ 3 MV/m) on each side of the belt. (a) What is the charging current delivered to the high voltage terminal in µA? Suppose we would like to accelerate the protons to an energy of 3 MeV. Take the radius of the spherical high voltage terminal to be the such that the electric field at the surface of the sphere just below the breakdown field of air (b) How long does it take to charge the high voltage terminal of the Van de Graaff from zero volts to 3 MV? The beam of 3 MeV protons is focused onto a lithium target. The beam is equivalent to a current of 5 µA. (c) At what rate do protons strike the target? (d) At what rate is energy (heat) produced in the target? (e) Would you consider the Van de Graaff a ‘source of emf ? Why or why not?
In: Physics