shivanshuwu

What causes the disease/disorder/syndrome/condition that Oxycodone is used to treat?

A hollow metal sphere of radius 5 cms is charged such that the potential on its surface is 10 volts. The potential at the centre of the sphere is

1) zero

2) 10 volts

3) same as at a point 5 cms away from the surface

4) same as at a point 25 cms away from the surface  

If the coefficient of χ8 in (aχ2 + 1/bχ )13 is equal to the coefficient of χ–8 in(aχ – 1/bχ2 )13, then a and b will satisfy the relation

1) ab + 1 = 0

2) ab = 1

3) a = 1 – b

4) a+b = – 1  

Get one  news item that are to related graft and corrupt practices done in the Philippine Government officials. Be sure to copy and paste. Be able to evaluate it using 100 words only. Acknowledge the source.

Critique the editorial

The value of 2cot2 (π/6) + 4tan2 (π/6) - 3cosec π/6 is

1) 2

2) 4

3) 4/3

4) 3/4  

Assume D is bounded, f maps D to R is continuous. , the IntegraD or f exists. Prove or Disprove: D has area.

1) In how many ways can Max select 3 toppings from 10 available toppings for his pizza?

What you know about RA 3019- Anti Graft and Corrupt Practices?

What you want to know about RA 3019- Anti Graft and Corrupt Practices?

What you have learned about RA 3019- Anti Graft and Corrupt Practices?

A duopoly is the most basic form of oligopoly, a market dominated by a small number of companies.

Below are the most famous "duopoly" businesses: Coca-Cola vs. Pepsi Boeing vs. Airbus Intel vs. AMD Select one of these "duopolies" and describe it in this discussion board.

1. What is the nature of these business?
2. What is their main product/service?
3. Which company is bigger?
4. How do these businesses differentiate their products?
5. Is the competition fierce in your opinion?
6. What are the main barriers to entry?
7. Do you think either of these companies will dominate the other in the long run?

4. Can you think of an industry that is dominated by only 2-3 firms? What is the nature of the product? Would it be easy to begin offering the product or service? Do you feel that the prices of the products they are offering are fair?

How would a manufacturer benefit by using fewer scarce resources?
a. The product would be less expensive to produce.
b. The product would better satisfy consumer needs.
c. The product would be popular and readily available.
d. The product would provide a more satisfactory profit.

A "black hole" is created when a star collapses to such asmallradius that the gravitational force at its surface becomessostrong that not even light can escape. This radius is calledtheSchwarzchild radius in honor of Karl Schwarzchildwhofirst solved the equations of General Relativity and showedthatblack holes could exist, at least in theory. Although thepropercalculation requires knowledge of General Relativity,interestinglywe can derive the correct Schwarzchild radius by doingacalculation using classical physics^*. That is,you'lluse the equation we derived in class and solve for theSchwarzchildradius assuming that the escape velocity equals thespeed oflight.

What is the Schwarzchild radius for a star of mass M =1.10x 10³⁰kg? (this star iscomparable in mass to ourSun).
1 m
Find the density of such a black hole
2 kg/m<sup>3

*</sup> The reason the classical calculation yields thecorrectanswer is there are are two errors that are made that"cancel" eachother out and fortuitously give the same answer asthe full, propercalculation using general relativity.

Most stars maintain an equilibrium size by balancing two forces - an inward gravitational force and an outward force resulting from the star's nuclear reactions. When the star's fuel is spent, there is no counterbalance to the gravitational force. Whatever material is remaining collapses in on itself. Stars about the same size as the sun become white dwarfs, which glow from leftover heat. Stars that have about three times the mass of the Sun compact into neutron stars. And a star with a mass greater than three times the Sun's mass collapses into a single point, called a black hole. In most cases, protons and electrons are fused together to form neutrons - this is the reason for the name neutron star. Neutron stars rotate very fast because of the conservation of angular momentum. Imagine a star of mass 5.57·1030 kg and radius 8.85·108 m that rotates once in 26.0 days. Suppose this star undergoes gravitational collapse to form a neutron star of radius 14.9 km. Determine its rotation speed.

A "black hole" is created when a star collapses to such asmallradius that the gravitational force at its surface becomessostrong that not even light can escape. This radius is calledtheSchwarzchild radius in honor of Karl Schwarzchildwhofirst solved the equations of General Relativity and showedthatblack holes could exist, at least in theory. Although thepropercalculation requires knowledge of General Relativity,interestinglywe can derive the correct Schwarzchild radius by doingacalculation using classical physics^*. That is,you'lluse the equation we derived in class and solve for theSchwarzchildradius assuming that the escape velocity equals thespeed oflight.

What is the Schwarzchild radius for a star of mass M =1.10x 10³⁰kg? (this star iscomparable in mass to ourSun).
1 m
Find the density of such a black hole
2 kg/m<sup>3

*</sup> The reason the classical calculation yields thecorrectanswer is there are are two errors that are made that"cancel" eachother out and fortuitously give the same answer asthe full,propercalculation using general relativity.

7. One object that is believed to be a black hole in ourGalaxyis
Athe central star inthe planetary nebula, the Ring Nebula inLyra.
Bthe central star in theCrab Nebula.
CCygnus X-1, a powerfulx-ray source.
Dthe Vela pulsar.

1. The escape speed Vis the minimum speed needed to project a mass m upward from thesurface of another
mass M (such as a planet, asteroid, or star). It is given byusing:

M = 1.99 × 10³⁰ kg ,

G= gravitational constant 6.67 x10^-11 N*m2/kg2

R = 6.96 × 10⁸m. is the radius of thesurface from the center of M

v=√2GM ====>>>>>> v= 6.1758 x10⁵ m/s

R
a) Suppose the Sun mysteriously begins to contract. What would bethe radius for which v escape fromthesurface equals the speed of light c? [This radius is known as theSchwarzschild radius. Anything thrown from that surface willeventually fall back on the surface. Interestingly Newton’suniversal gravitation and Einstein’s general relativity predict thesame value fo the Schwarzschild radius.]

b) Find the Schwarzschild radius for Earth’s mass 5.97 ×1024 kg.

Black holes are objects whose gravitational field is so strong thatnot even light can escape. One way of thinking about this is toconsider a spherical object whose density is so large that theescape speed at its surface is greater than the speed of light, c.If a star's radius is smaller than a value called the Schwarzschildradius Rs, then the star will be a black hole, that is, lightoriginating from its surface cannot escape.
(a) For a nonrotating black hole, the Schwarzschild radius dependsonly upon the mass of the black hole. Show that it is related tothat mass M by Rs = (2GM)/c2.
(b) Calculate the value of the Schwarzschild radius for a blackhole whose mass is ten solar masses.
-----(ANSWER in km)

P.S. The problem gives the hint "Use conservation of energy, and anescape speed equal to the speed of light to derive the expressionfor the Schwarzchild radius of a non-rotating black hole."

Thank you so much for any help!

Show that a black hole attracts an object ofmass m with aforce of

Anything about black hole?