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# obscuritas88

• ### Collision Domain of Routers vs. Switch to Modem?

I'm wondering if there is any data transmission loss between a setup that goes like this:

2 Computers -> Router -> Modem

Versus:

2 Computers -> Switch -> Router -> Modem

The 1st setup, the two computers reside on separate broadcast domains but they share a collision domain as they go to the modem so should the performance be the same in both cases?

• ### What is the coldest temperature a flame can be?

I know some gasses burn hotter than others but there must be a lowest temperature burning gas?

2 AnswersOther - Science8 years ago
• ### Probability Given Two Normally Distributed Functions' Mean and Standard Deviation?

If function A is normally distributed with mean mu_A = 26 and standard deviation sigma_A = 1.5, and function B is normally distributed with mean mu_B = 22 and standard deviation sigma_B = 1.2; What is the probability that A is greater than B by at least 8?

I've gotten this far:

I normalize the functions about the standardized normal:

P(Z > (A-26+8)/1.5) * P(Z <= (B-22)/1.2)

But I have no idea how to arrive at an answer other than "It is very unlikely to occur" because the real answer would be an average of the probability at every point Y but since the distribution is continuous is the probability then just 0?

• ### Polish Vocabulary Question?

There are two phrases that must be idioms but maybe someone can offer an explanation as to why they mean what they do?

Nic ci nie będzie

Means "You will be fine" idiomatically but literally should mean "Nothing these(they) will not"

The other phrase is part of a conversation:

Czy nie ma u ciebie Krystyny?

Nie, nie ma.

The best I could translate this as is something in English like "Do you know where she is?" "No, I have no (idea)"

• ### Polish Vocabulary Question?

What is the difference in English between these three words

koleżanki przyjaciółki przyjaciele

• ### Finding thickness given density of a medium, diameter and mass of an object?

Given that the density of rubber is 100 kg/m^3, what is the thickness of the rubber skin of an NBA basketball? (Vol of sphere is 4/3pi r^3)

Mass = 0.5966 kg

The units are already in SI and I know they are correct.

Also the density for the basketball is 82.861 kg/m^3 I found which may or may not be correct.

We were told to use the set-up of the following to arrive at the answer:

1100kg/m^3 = (0.597kg)/(volume using entire radius - volume using inside radius) and that will give you the thickness but I can't seem to work it out. The end answer is 3 mm or 0.003 m.

• ### Spectral Observations?

When do you observe each of the following:

Continuum Spectrum

Spectrum with mostly emission lines

Spectrum with mostly absorption lines

Just need an example for each, to my understanding one light source like the sun can fit all of the above because of its pretty even distribution of emission across the visible spectrum in accordance with its composition of mostly hydrogen and helium but other heavier elements.