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Black hole formation as seen by a distant observer

Given that matter can never cross the event horizon of a black hole (from an external observer point of view), if a black hole is "fed" with a large amount of matter then the new matter will eventually become extremely compressed, and presumably would be compressed below its Schwarzchild radius.

Would secondary black holes eventually form near the original black hole?

As an alternative one could also imagine that the combined mass of the original black hole and the new mass around the event horizon becomes contained within the Schwarzchild radius of both masses, and so a new event horizon forms, "swallowing" the new mass around the edge of the original black hole.

This mechanism would allow black holes to swallow mass in a finite time.
Would this contradict GR predictions?

Problem 10-1 Acquisition costs [LO10-1, 10-2, 10-3, 10-4]

Tristar Production Company began operations on September 1, 2018. Listed below are a number of transactions that occurred during its first four months of operations. (FV of $1, PV of $1, FVA of $1, PVA of $1, FVAD of $1 and PVAD of $1) (Use appropriate factor(s) from the tables provided.)

1. On September 1, the company acquired five acres of land with a building that will be used as a warehouse. Tristar paid $230,000 in cash for the property. According to appraisals, the land had a fair value of $160,000 and the building had a fair value of $90,000.
2. On September 1, Tristar signed a $53,000 noninterest-bearing note to purchase equipment. The $53,000 payment is due on September 1, 2019. Assume that 8% is a reasonable interest rate.
3. On September 15, a truck was donated to the corporation. Similar trucks were selling for $3,800.
4. On September 18, the company paid its lawyer $4,000 for organizing the corporation.
5. On October 10, Tristar purchased maintenance equipment for cash. The purchase price was $28,000 and $1,150 in freight charges also were paid.
6. On December 2, Tristar acquired various items of office equipment. The company was short of cash and could not pay the $6,800 normal cash price. The supplier agreed to accept 200 shares of the company's nopar common stock in exchange for the equipment. The fair value of the stock is not readily determinable.
7. On December 10, the company acquired a tract of land at a cost of $33,000. It paid $4,000 down and signed a 10% note with both principal and interest due in one year. Ten percent is an appropriate rate of interest for this note.

Required:
Prepare journal entries to record each of the above transactions. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field. Round final answers to the nearest whole dollars.)
  

Four masses are at the corners of a square of length ℓ = 20.0 cm and a fifth mass is at the center of the square. The masses are m₁ = 5.00 g, m₂ = 3.00 g, m₃ = 1.00 g, m₄ = 5.00 g, and m₅ = 1.50 g.

a-Draw the free body diagram for fifth mass.

b-Determine the net gravitational force on the fifth mass in unit vector notation.

Explain how the optimal combination of work and consumption changes after a decline in the wage rate. (It would be helpful for you to practice graphing this in the consumer’s problem)

For the following reaction: NiO2(s) + 4 H+(aq) + 2 Ag(s) → Ni2+(aq) + 2 H2O(l) + 2 Ag+(aq) script E° = 2.48 V Calculate the pH of the solution if script E = 2.32 V and [Ag+] = [Ni2+] = 0.012 M. Use the Standard Reduction Table.

Use the “Golden Rules of probability distributions” to prove that all coordination games have a mixed strategy Nash equilibrium.

1. Explain what information is embedded into the yield curve. How can we use it to learn market-level expectations for the short-term interest rates?

Answer the following questions about one-dimensional motion.

1. Imagine a fox darting around in the woods for several hours. Can the displacement △xof the fox from his initial position ever be larger than the total distance d he traveled? Explain.
2. What is the difference between acceleration and velocity? Write a paragraph that would make sense to a 5th grader.
3. Give an example of a situation where an object has an upward velocity, but a downward acceleration.
4. What is the difference between average and instantaneous velocity? Make up an example involving a trip in a car that demonstrates your point.
5. If the position of an object is increasing linearly with time (i.e., △x is proportional to t), what can we say about its acceleration? Explain your thinking.
6. If the position of an object is increasing non-linearly with time (i.e., △x is not proportional to t), what can we say about its velocity? Explain your thinking.

Part 1. A catcher “gives” with the ball when he catches a 0.113 kg baseball moving at 22.4 m/s.

If he moves his glove a distance of 6.1 cm, what is the average force acting on his hand?

Answer in units of kN.

Part 2.

Repeat for the case in which his glove and hand move 10.5 cm.

Answer in units of N.

In the essay, “The Walls of Thebes,” what is the significance of the title of this essay? How is the title related to the central theme or argument present in the essay?

A spherically-symmetric planet is made of an empty inner core of radius a surrounded by a thick shell of radius 2a, which is surrounded by another thick shell of radius 3a. The inner shell has a volume density that only depends on radius and is given by s1(r) = br^3, where b is a known positive constant. The outer shell also has a volume density that only depends on radius and is given by s2(r) = y/(r^2), where y is a known positive constant.

[Planet 2]

b=alpha

s= rho

y=gamma

Find the gravitational field in the following regions in terms of G, b, y, a, and r.

r < a:

a < r < 2a:

2a < r < 3a:

r > 3a:

A point charge with charge q1 = 3.50 μC is held stationary at the origin. A second point charge with charge q2 = -4.80 μC moves from the point ( 0.170 m , 0) to the point ( 0.255 m , 0.260 m ). How much work W is done by the electric force on the moving point charge?

Express your answer in joules. Use k = 8.99×10⁹ N⋅m^2/C^2 for Coulomb's constant: k=1/4πϵ0.

An atom of beryllium (m = 8.00 u) splits into two atoms of helium (m = 4.00 u) with the release of 92.2 keV of energy. Suppose the beryllium atom moved in the positive x direction and had a kinetic energy of 44.0 keV. One of the helium atoms is found to be moving in the positive x direction. Find the direction of motion of the second helium, and find the velocity of each of the two helium atoms. Solve this problem in two different ways: by direct application of conservation of momentum and energy; and by applying the results if the original beryllium atom is at rest to a frame of reference moving with the original beryllium atom and then switching to the reference frame in which the beryllium is moving.

(a) by direct application of conservation of momentum and energy

(b) by applying the results if the original beryllium atom is at rest to a frame of reference moving with the original beryllium atom and then switching to the reference frame in which the beryllium is moving

Continuing Payroll Problem, 6B, Chapter 6

You have almost completed the Kipley's Company Employee Payroll Register for the pay period ending January 8, 20XX.

Requirements:

Record the deduction for group insurance.

Record the health insurance deduction.

Record the check number assigned to each employee.

Compute and record the net pay for each employee.

Total the input columns on the Employee Payroll register.

On Employer Register, enter total gross earnings.

Prepare the journal entries as of January 12 to record the payroll and the payroll taxes for the week ending January 8. Credit Salaries Payable for the total net pay.

Prepare the journal entry to record the payment of the payroll on January 14 when the paychecks are distributed to all workers.

Employee Benefits

Employee Benefits

The table below lists the employee contributions to Group Insurance and Health Insurance. Also, a check number has been assigned to each employee. Note that some employees are not yet eligible for Group Insurance coverage under the company plan.

Payroll Register

Completing the Payroll Register

The Employee Payroll Register presents all the computations previously performed as it applies to this payroll period.

Complete the following steps (if an field should be blank, leave it blank):

Record the amount to be withheld for group insurance.

Record the amount to be withheld for health insurance.

Each worker is to be paid by check. Assign check numbers provided to the correct employee..

Compute the net pay for each employee.

Total the input columns.

Employer Register

Employer Register

Complete the following:

Record the total gross earnings.

Journal Entry: Recording Payroll

Journal Entry: Recording Payroll

Complete the following:

Prepare the journal entries as of January 12 to record the payroll and the payroll taxes for the week ending January 8. Credit Salaries Payable for the total net pay.

Starting with 0.280mol SbCl3 and 0.160mol Cl2, how many moles of SbCl5, SbCl3, and Cl2 are present when equilibrium is established at 248?C in a 2.50?L flask? SbCl5(g)?SbCl3(g)+Cl2(g) Kc=0.025 at 248?C

I have the answers but can someone please show the work.

Answers:

SbCl5=.11587 mol
SbCl3=.16413 mol
Cl2= .04413 mol