Questions
Estimate the distance from the Sun where a comet nucleus begins to create a coma as...

Estimate the distance from the Sun where a comet nucleus begins to create a coma as the icy materials sublimate to gases. The sublimation temperature for various comet constituents such as CO2 and H2O are not well known in a vacuum but it is near 150K. One can make an estimate of the “equilibrium” temperature of a spherical object in the Solar System by calculating the temperature where the power from sunlight received by the day side is exactly balanced by the blackbody emission from the entire surface. (a) At what distance from the Sun is the equilibrium temperature found to be 150K? (b) How do your results compare to the distances where comets are usually first detected?

In: Physics

If we propose a new theory or idea (say a cosmic model) which got no mathematical...

If we propose a new theory or idea (say a cosmic model) which got no mathematical proof of it's own but the theory uses previous mathematically solved and proved theories like Relativity and which sounds completely logical considering all the proved theories are applied correctly to it. Can we copyright this idea and ensure that nobody can steal it in the near future? Can this idea actually come into the limelight and be a topic of discussion. If so, how can it be done? Please help me out. Can I post this idea somewhere reliable where nobody could steal as such. (Considering the idea would actually be a good one)

In: Physics

Currently, the spot rate is $1.28/£. As a trader, you believe that the British pound will...

Currently, the spot rate is $1.28/£. As a trader, you believe that the British pound will appreciate significantly in the near future. You decide to speculate by buying a December call option with a strike price of $1.35/£ and a premium of $0.05/£. Please answer the following questions:

1. Explain briefly why buying a call option makes sense in this case.

2. How much is the intrinsic value of the option? And how much is the time value?

3. Please fill in the blanks of the table below.

Spot rate at maturity in December

Exercise or not?

Net profit

Moneyness

(ITM, ATM or OTM)

$1.20/£

1.25

1.30

1.35

1.40

1.45

In: Finance

Currently, the spot rate is $1.33/£. As a trader, you believe that the British pound will...

Currently, the spot rate is $1.33/£. As a trader, you believe that the British pound will depreciate significantly in the near future. You decide to speculate by buying a December put option with a strike price of $1.35/£ and a premium of $0.05/£. Please answer the following questions:

1. Explain briefly why buying a put option makes sense in this case.

2. How much is the intrinsic value of the option? And how much is the time value?

3. Please fill in the blanks of the table below.

Spot rate at maturity in December

Exercise or not?

Net profit

Moneyness

(ITM, ATM or OTM)

$1.20/£

1.25

1.30

1.35

1.40

1.45

In: Finance

Keynes wrote in The General Theory: “If we speak frankly, we have to admit that our...

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 economic turmoil or crisis like that we are experiencing now, when confusion about what happens next is obvious to all. In Keynes’ view, a state of “near ignorance” was the normal state of affairs.

Please discuss Keynes’ concept of “uncertain” knowledge and what it may imply for our ability to (a) measure risk in portfolios of financial assets and to (b) make “rational” investment decisions.

In: Economics

Currently, the spot rate is $1.28/£. As a trader, you believe that the British pound will...

Currently, the spot rate is $1.28/£. As a trader, you believe that the British pound will appreciate significantly in the near future. You decide to speculate by buying a December call option with a strike price of $1.35/£ and a premium of $0.05/£. Please answer the following questions:

1. Explain briefly why buying a call option makes sense in this case.

2. How much is the intrinsic value of the option? And how much is the time value?

3. Please fill in the blanks of the table below. Spot rate at maturity in December Exercise or not? Net profit Moneyness (ITM, ATM or OTM)

$1.20/£

1.25

1.30

1.35

1.40

1.45

In: Finance

As song sparrow population density increases, A. the average reproductive success of individual song sparrows tends...

As song sparrow population density increases,

A. the average reproductive success of individual song sparrows tends to increase.

B. the average reproductive success of individual song sparrows tends to decrease.

C. the average reproductive success of individual song sparrows does not change.

D. the average reproductive success of individual song sparrows is unpredictable


Mosquitos have a life history that is near the extreme of

A. r-selection.

B. K-selection.

C. (both)

D. (neither)


During the early and middle twentieth century, there was
A. a sharp increase in human birth rate.
B. a sharp decrease in human death rate.
C. (both)
D. (neither)

In: Biology

You and your friend Paul want to have a bet on how fast it can take...

You and your friend Paul want to have a bet on how fast it can take to reach another friend Peter who is near the star Sirius B. Knowing that the star has a proper length of 8.6 light years from Earth, Paul thinks that since the maximum speed of your ship is 70% that of the speed of light, it will take about 9 years to get there. However, you reason that around 12 years will make more sense.

a)      Who is right from the perspective of you and Paul?

b)      When you reach Peter and explain the bet, he disagrees about who was right, why is that?

In: Physics

Cohleland, a developing country, has a government that wants to encourage the country’s growth. In each...

Cohleland, a developing country, has a government that wants to encourage the country’s growth.

In each scenario, what policy would you recommend the government of Cohleland to enact in order to increase growth?

The country has an abundance of capital and labor with low levels of human capital and technology.The country has low levels of capital, human capital, and technology; however, there is plenty of labor.

The country has an abundance of capital and labor with low levels of human capital and technology. Also, Zackburgh, a rich city-state near Cohleland has been offering fast track citizenships to any person from Cohleland who has earned a college degree.  

In: Economics

Explain the phenomenon of induction that was studied in this activity (bringing a negatively charged plastic...

Explain the phenomenon of induction that was studied in this activity (bringing a negatively charged plastic rod near an uncharged non-metal-coated styrofoam ball that is hanging freely and an uncharged metal-coated styrofoam ball that is hanging). For example, explain how a metal conductor such as a hanging ball of aluminum foil can be attarcted to a charged insulator even though the ball of foil has no net charge so that is is electrically neutral. Can two metal balls with no net charge attract each other? Explain. Can the process of induction cause a neutral conductor to be repelled from a charged insulator? Explain.

Thank you very much :)

In: Physics