S K

Can dark matter and dark energy be considered a overlapping parallel universe conceptually and does the math support that hypothesis? if not why is the distinction made?

I would like to know which groups/empires (ie Mughal, Persian....) they belonged to going back to maybe which genus they evolved from. here is an article that made me think of this question http://news.discovery.com/human/genetics-neanderth...

For google Chrome or Firefox (add-on), quality of the ripped file should be good. Also is there a good one for soundcloud and mixcloud.

I need to find a good FREE (not free # day trial) to monitor phone call and text messages on an android cell phone. GPS location would be a plus. It has to be FREE since I only plan to use it for a week or 2 so I don't want to invest in an expensive software. I don't want to use any free trials due to after the trial ends the software will most likely as the user of the phone to purchase the full version giving away that fact that they were being monitored. It has to be completely stealth on the users phone. Any good suggestions ?

I need to find a good FREE (not free # day trial) to monitor phone call and text messages on an android cell phone. GPS location would be a plus. It has to be FREE since I only plan to use it for a week or 2 so I don't want to invest in an expensive software. I don't want to use any free trials due to after the trial ends the software will most likely as the user of the phone to purchase the full version giving away that fact that they were being monitored. It has to be completely stealth on the users phone. Any good suggestions ?

I am trying to simplify something easy, but it has been a while and ive forgotten some rules:

(a + b) * (~b + c) =? (a * ~b) + (a * c) + (b * ~b) + (b * c) =? [a * (~b + c)] + [b * (~b + c)]

ok so far i have: a(~b+c) + b(~b+c)

there is a rule for this but i cant remember do both the (~b+c) just cancel out like in regular math or what is the rule?

The final answer should be: (a + c)

I know there are other steps that be be taken to simplify differently, however I want to know what to do when your in this situation: a(~b+c) + b(~b+c)

I am trying to simplify something easy, but it has been a while and ive forgotten some rules:

(a + b) * (~b + c) =? (a * ~b) + (a * c) + (b * ~b) + (b * c) =? [a * (~b + c)] + [b * (~b + c)]

ok so far i have: a(~b+c) + b(~b+c)

there is a rule for this but i cant remember do both the (~b+c) just cancel out like in regular math or what is the rule?

The final answer should be: (a + c)

I know there are other steps that be be taken to simplify differently, however I want to know what to do when your in this situation: a(~b+c) + b(~b+c)

I am writing a algorithm to test how fast the area under a function can be found. My function is e^(-x^2). when i integrate the function from -3 to 3 i get about 1.77241. Next i tried to compute the area of the function again, but i converted the function to the first 5 non zero terms in the taylor series. I got: 1-x^2+x^4/2-x^6/6+x^8/24+O(x^9) where O(x^9) is the error. when i integrate 1-x^2+x^4/2-x^6/6+x^8/2 from -3 to 3 i get 2119.46 which is not even close to the real integral. how do i compute the area under the taylor series version of the function to get a similar answer to 1.77. Shouldnt the regular function and the taylor series function be equal (except for the error term), which would make the integrals equal???

I am writing a algorithm to test how fast the area under a function can be found. My function is e^(-x^2). when i integrate the function from -3 to 3 i get about 1.77241. Next i tried to compute the area of the function again, but i converted the function to the first 5 non zero terms in the taylor series. I got: 1-x^2+x^4/2-x^6/6+x^8/24+O(x^9) where O(x^9) is the error. when i integrate 1-x^2+x^4/2-x^6/6+x^8/2 from -3 to 3 i get 2119.46 which is not even close to the real integral. how do i compute the area under the taylor series version of the function to get a similar answer to 1.77. Shouldnt the regular function and the taylor series function be equal (except for the error term), which would make the integrals equal???

I am writing a algorithm to test how fast the area under a function can be found. My function is e^(-x^2). when i integrate the function from -3 to 3 i get about 1.77241. Next i tried to compute the area of the function again, but i converted the function to the first 5 non zero terms in the taylor series. I got: 1-x^2+x^4/2-x^6/6+x^8/24+O(x^9) where O(x^9) is the error. when i integrate 1-x^2+x^4/2-x^6/6+x^8/2 from -3 to 3 i get 2119.46 which is not even close to the real integral. how do i compute the area under the taylor series version of the function to get a similar answer to 1.77. Shouldnt the regular function and the taylor series function be equal (except for the error term), which would make the integrals equal???

can someone explain how to read from a file, line by line and store each line in an ArrayList using java and eclipse, please provide full java code and how to get eclipse to find the file.

What is the difference between a Private method, Public method, Protected method and a Package method?

An electron is trapped in a one-dimensional infinite well and is in its first excited state. The five longest wavelengths of light that the electron could absorb in transitions from this initial state via a single photon absorption: λa = 44.58 nm, λb = 18.57 nm, λc = 10.61 nm, λd = 6.97 nm, and λe = 4.95 nm. What is the width of the potential well?

How do u mount a floppy and/or a cd/dvd drive in Linux and openBSD? Also is there a command that lets u view all mounted drives ? where can i find a list of commands?

Two speakers separated by distance d1 = 2.30 m are in phase. You are standing 3.90 m directly in front of one speaker. Each speaker has an output power of 1.80 W. Because the speakers are at different distances, there will be frequencies at which the sound from the speakers interferes destructively. But because the speakers are at different distances, the sound intensities will not be the same, so the destructive interference will not be complete. We want to find the sound level when there is destructive interference. Use 343 m/s for the speed of sound in air.

Distance from the far speaker to ur ear = 4.528m

Lowest frequency that gives minimum signal (destructive interference) at your ear = 273.0892 Hz

Second lowest frequency that gives minimum signal = 819.268 Hz

Intensity from the near speaker = .00942 W/m2

Intensity from the far speaker = .00699 W/m2

What is the combined intensity during destructive interference? W/m2

What is the sound level during destructive interference? dB

At a distance of 13 km, a 140 Hz horn, assumed to be a point source, is barely audible. At what distance would it begin to cause pain? (Pain Threshold = 120dB)

A string, tied to a sinusoidal oscillator at P and running over a support at Q, is stretched by a block of mass m. The separation L between P and Q is 1.30 m, and the frequency f of the oscillator is fixed at 120 Hz. The amplitude of the motion at P is small enough for that point to be considered a node. A node also exists at Q. A standing wave appears when the mass of the hanging block is 286.1 g or 447.0 g, but not for any intermediate mass.

What is the linear density of the string?

MORE: OSCILATOR-----POINT P --------------------POINT Q

Extending down from Q is the hanging BLOCK also assume n=4

A sinusoidal wave of frequency 550 Hz has a speed of 270 m/s.

(a) How far apart are two points that differ in phase by π/3 rad?

(b) What is the phase difference between two displacements at a certain point at times 1.00 ms apart?

rad

What phase difference between two otherwise identical traveling waves, moving in the same direction along a stretched string, will result in the combined wave having an amplitude 1.45 times that of the common amplitude of the two combining waves? Express your answer in degrees, radians, and wavelengths.

1) _____ °

2) _____ rad

3) _____ λ

A nylon guitar string has a linear density of 7.3 g/m and is under a tension of 152 N. The fixed supports are distance D = 90.0 cm apart. The string is oscillating in the standing wave pattern shown in below.

(a) Calculate the speed of the traveling waves whose superposition gives this standing wave.

m/s

(b) Calculate the wavelength of these traveling waves.

cm

(c) Calculate the frequency of these traveling waves.

Hz