Nasty_Exotica

What type of star is most responsible for the majority of elements that we have on

Earth (explain your reasoning)?

What are (at least) two reasons that looking for life on planets orbiting O stars might be

a bad idea?

Put the following terrestrial worlds in the order that likely represents their distances from their star (from closest to farthest):

World A B C D E

Density 2.6 g/cm3 3.1 g/cm3 6.2 g/cm3 1.7 g/cm3 5.8 g/cm3

Approximately, where is the Habitable zone around the Sun? How does the

Habitable zone change for worlds in orbit around an M dwarf?

If the Sun is the size of a penny (1 cm), what is the distance to the Andromeda Galaxy

on this scale? (hint: Sun is 1.4 x 1011 cm in diameter and 1 pc = 3 x 1018 cm).

When a transiting exoplanet passes in front of its host star, it blocks a fraction of light

that is equal to the ratio of the areas of the two objects. How much light is blocked when

a planet the size of Mars (1/2 the size of Earth), passes in front of a star the size of the

Sun (100 times the size of Earth)?

If you weigh 150 pounds on the Earth, how much do you weigh on Pluto? (hint: Pluto

has a mass that is 1/500 that of Earth’s and a radius that is 1/5 the size of Earth’s)

How would you describe the bulk composition of a world that has a density of 6

g/cm3? What about one with a density of 2 g/cm3?

How does the force of gravity between the Andromeda Galaxy and the Milky Way

compare to the force that the Sun feels from its nearest star? (hint: you can assume that

the closest star has a mass that is ¼ that of the Sun, and is roughly 1 pc away. You can

also assume that both galaxies are the same mass, roughly 1 trillion times the mass of the

Sun and are separated by a distance of 0.7 Mpc).

A population contains five million 0s and 1 million 1s. What is the sampling distribution of the sample mean when the sample size is n=5?

X = 0,1,2,3,4,5

PX = ?

dy/dt = 3y + 2e^(5t)

dy/dt = [(t^3).y] + (t^3)

y(0) = 0

Write a function update(displayed, secret, guess) that takes as inputs three strings – the current version of the displayed word, the secret word, and a guess – and that returns a version of the displayed word that has been updated in light of the guess. In other words, for every position at which guess appears in secret, the returned string should include guess at that position. For every position at which guess does not appear in secret, the returned string should include whatever character is currently at that position in displayed. You can use while and for For example:

>>> update('---------', 'recursive', 'r')

'r---r----'

>>> update('too', 'big', 'b')

'boo'

This is what I have but it doesn't work

def update(displayed,secret,guess):

""" returns a version of the displayed word

that has been updated in light of the guess.

"""

if secret == '' or len(displayed) != len(secret):

return ''

else:

if guess in secret:

if secret[0]==guess:

return (guess+displayed[1:],secret,guess)

return update(displayed[:1],secret[1:],guess)

elif guess not in secret:

return (displayed, secret, guess)

Create a time series plot of S&P500 using Stata. Summarize your findings briefly.

Let St denote the price of S&P500 on date t. For example, S01/25/13 = 1502.96. Now for each

day from 12/04/12 to 01/25/13, compute the daily return of S&P500 using the formula:

Rt ≡

St − St−1

St−1

× 100 (%).

Hint: Use generate command in Stata.

Consider the Ermentrout-Kopell model for the spiking of a neutron

dA/dt = 1 - cosA + (1 + cosA) I(t)

Let the input function I(t) be the function that is constantly -1/3

a) Determine the equilibrium points for this input

b) Classify these equilibria

by April 1, 2013

by April 1, 2016

by April 1, 2014

by April 1, 2015

Tim suffered greatly this year. In January a freak storm damaged his sailboat and in July Tim's motorcycle was stolen from his vacation home. Tim originally paid $27,000 for the boat, but he was able to repair the damage for $6,200. Tim paid $15,500 for the motorcycle, but it was worth $17,000 before it was stolen. Insurance reimbursed $1,000 for the boat repairs and the cycle was uninsured.

a. Calculate Tim's deductible casualty loss if his AGI is $50,000.

b. Calculate Tim's deductible casualty loss if his AGI is $150,000.

c. How would you answer a. if Tim received an additional $65,000 in interest from municipal bonds this year?

This year, Major Healy paid $40,000 of interest on a mortgage on his home (Major Healy borrowed $800,000 to buy the residence; $900,000 original purchase price and value at purchase; $1,000,000 current worth), $6,000 of interest on a $120,000 home equity loan on his home (loan proceeds were used to buy antique cars), and $10,000 of interest on a mortgage on his vacation home (loan of $200,000; home purchased for $500,000). Major Healy’s AGI is $220,000. (Do not round intermediate calculations.)

a) How much interest expense can Major Healy deduct as an itemized deduction?

b) Assume the original facts, except that Major Healy’s home had a fair market value of $1,000,000 when he purchased the home and took out the home equity debt, but now the home is worth $500,000. How much interest expense can Major Healy deduct as an itemized deduction?

F(x,y) = [(4*x^3*y^3)+1/x] i + [(3*x^4*y^2)-1/y] j

Consider the solid bounded by the plane z=4x and below by the circle x^2 + y^2 = 16 in they plane. Evaluate the double integral in polar coordinates

Hello I am trying to integrate the following

integral_1^2 integral_z^2 integral_0^(y*sqrt3) {y/[(x^2) + (y^2)} dx dy dz

AND

I am trying to change the order of integration into ∫∫∫ f(x,y,z) dz dy dx for

∫0^3∫0^[sqrt(9-z^2)]∫0^[sqrt(9-(y^2)-(z^2))] f9x,y,z) dx dy dz

A summary of London fashion's December 31 2011, accounts receivable aging schedule is presented below along with the estimated percent uncollectible for each age group:

Age group Amount. %

0-60 days 40,000. 0.5%

61-90 days. 15,000. 1.5%

91-120 days. 2,000. 15%

Over 120 days 800. 80%

The allowance for uncollectible accounts had a balance of $1,600 at January 1 2011. During the year bad debts of $1150 were written off.

Required - prepare all 2011 journal entries with respect to bad debts and the allowances for uncollectible accounts.

Hello I am trying to convert the following x,y double integral to polar coordinates and solving it

integral_0^1 integral_0^(sqrt(1-x^2)) [e^(-x^2-y^2)] dy dx

the answer should aprox. ~~0.496466

charlie st cloud?

40 days and 40 nights?

mr and mrs smith?

as good as it gets?

good will hunting?

the ugly truth?

when harry met sally?

love happens?

date night?

the last song?

the sweetest thing?

nick and Norah's infinite playlist?

the dukes of hazzard?

raise your voice?

the time travellers wife?