Two neutron stars are separated by a distance of 1.0x10¹⁰ m. They each have a mass of 1.0x10³⁰ kg and a radius of 500000 m. They are initially at rest with respect to each other. As measured from the rest frame, how fast are they moving when their separation has decreased to one-half its initial value?

___________  m/s (The correct answer for this is 81663.94319)

How fast are they moving when they collide?
___________  m/s (I can't figure out this answer.)

Please use my numbers to work out the solution. Thanks!

A lead pellet with a mass of 26.47 g and at an initial temperature of 89.98 °C was dropped into a beaker containing 100.0 g of water at an initial temperature of 22.50 °C. Given the sp heat capacity of water = 4.184 J/gK and of lead = 0.158 J/gK, calculate the final temperature of both the lead and the water?

what are the principal e-commerce business models

Name and describe the principal e-commerce business models

The mass of carbon in an animal bone fragment found in an archeology site is 200 g. If the bone registers an activity of 16 Bq, what is its age? Note: 12.0 g of C¹²₆ contains 6.02 x 1023 atoms and C¹⁴₆ / C¹²₆ ~ 1.3x10^-12

Expected Return: Discrete Distribution

A stock's return has the following distribution:

Calculate the stock's expected return. Round your answer to two decimal places.

  %

Calculate the standard deviation. Do not round intermediate calculations. Round your answer to two decimal places.

  %

What is a NOSQL database? For what types of applications would be a NOSQL database preferred over a relational database. Provide the name of a NOSQL database used in the real world.

1. What are the names of the parts of a UNIX command? list them, and give a brief description of each.

2. Can multiple UNIX commands be typed on the same single command line? Explain how

3. How can you find out which utilities are available on your system for editing files? Which utilities are available for editing on your system?

4. What does the following command do? What is $PATH and echo $PATH?

5. What is the result of giving the which utility the name of a command that resides in a directory that is nor in your search path?

Section 1

How far from a -7.40 μC point charge must a 2.00 μC point charge be placed in order for the electric potential energy of the pair of charges to be -0.500 J ? (Take the energy to be zero when the charges are infinitely far apart.)

d = ____ m   (The Answer Is Not 0.52 m)

Section 2

A point charge has a charge of 2.50×10⁻¹¹ C .

Part A

At what distance from the point charge is the electric potential 84.0 V ? Take the potential to be zero at an infinite distance from the charge.

d = ___ m

Part B

At what distance from the point charge is the electric potential 25.0 V ? Take the potential to be zero at an infinite distance from the charge.

d = ___ m

Write balanced molecular and net ionic equations for the reaction that occurs when

     each of the following is added to a perchloric acid solution.

     a) a barium hydroxide solution

      b) solid barium sulfate

c) aluminum metal

A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 7.60 m/s at an angle of 15.0

1A. Calculate GDP per Capita for the current year and previous year.

1B. What is the annual growth rate of GDP per Capita? How do you find it?

1C. How do real GDP growth and population growth affect GDP per capita growth?

1D. Using your calculated figure in (1B), calculate the amount of GDP per capita (future value) after 18 years.

1E. Using the rule of 72, calculate how many years GDP per capita will be double.
72/growth rate = number of years to double the actual value

Describe the hubs and spokes model of semantic memory. Why are lesions in the premotor/motor cortices more likely to produce categorical deficits for tools than animals? Why do lesions in the anterior temporal lobe produce deficits for a wider range of concepts?

Describe rotameter-type flowmeters, explain how they work, and compare them with

Venturi flowmeters

Bruins Inc. has the following items in their current balance sheet:
Common Stock 10,000,000 shares authorized, $1,000,000 issued - $3,000,000
Capital Surplus - $9,000,000
Treasury Stock on Common   100,000 shares - $6,000,000
Cumulative Preferred Stock 500,000 authorized
[2%]  $100 par - $8,000,000
Treasury Stock on Preferred Stock 10000 shares - $6,000,000
Retained Earnings - $60,000,000

1. If Bruins Inc. were to provide for a 10% common stock dividend, then how many new shares are to be mailed to existing shareholders?
2. Assume in question [6] the market price of the common stock was $15 at the time of the stock dividend announcement. What is the journal entry to record the stock dividend?
3. Using the equity portion of the Bruins Inc. balance sheet above, determine the amount of the total equity in Bruins Inc.  Assume this question ignores the results of questions [1-7] above.
   
   I want the above questions answered: but the following is all of the information:
   Bruins Inc. wishes to announce a total cash dividend of $40,000,000.  How is this dividend to be split between the common and preferred stockholders?
   What is the dividend per share for common and preferred after the dividend distribution from question 1 above?
   Suppose Bruins Inc. was two years in the arrears in paying dividends to the preferred stockholders, then what is the dollar amount of the preferred and common shareholder dividend?
   How many Bruins common stock shares are outstanding?
   If Bruins Inc. announces a 4 for 1 stock split of the cumulative preferred then what is the new total amount of the preferred stock?
   If Bruins Inc. were to provide for a 10% common stock dividend, then how many new shares are to be mailed to existing shareholders?
   Assume in question [6] the market price of the common stock was $15 at the time of the stock dividend announcement. What is the journal entry to record the stock dividend?
   What is the impact of the 20% common stock dividend on the balance sheet? Assume this question ignores questions [1-9] above.
   Using the equity portion of the Bruins Inc. balance sheet above, determine the amount of the total equity in Bruins Inc.  Assume this question ignores the results of questions [1-7] above.
   What is the impact of the common and preferred cash dividend [$5,000,000 as per question 1 above] on the current balance sheet of Bruins Inc.?

A 54.1 mg sample of sodium perchlorate contains radioactive chlorine-36 (whose atomic mass is 36.0 amu).

1. If 29.6% of the chlorine atoms in the sample are chlorine-36 and the remainder is naturally occurring nonradioactive chlorine atoms, how many disintegrations per second are produced by this sample?

The half-life of chlorine-36 is 3.0×105 yr.