Hi -
I have a quick question. I understand that the sum of two normal distributions is a normal distribution. Now let's say I have the z-score from one normal distribution and the z-score of another set of data that is also normally distributed and a third and a fourth etc.
I just want...
o if there is an increase in surface area of the bag in contact with the table and book then the rate will change. Even with the weight being fully supported the entire time on the bag and the weight not changing?
Interesting
Hi I am a post-doc student in a field having very little to do with physics and math.
currently I am designing an experiement and have (i hope) a relatively simple question.
here is the scenario:
A ziplock bag (or similarly non-elastic reservoir) contains water, but is not maximally...
Hum. Are you trying to get me to think about the difference between diffuse reflection-irregularities and impurities in the road- and regular
reflection. I know Theta incidence = theta reflection.
The water acts like a mirror? or lens? and create an inverted image right?
I could get be...
Hi. I need to write up a short one paragraph on a picture I took-- I just need hints or suggestions so I can go and research the effect myself. Any insights would be greatly appreciated.
I have a picture of a traffic light (red). The ground is wet after rain. The red light is smeared out...
Hi Sorry for that.
for number one I meant to say electric field
for number 2 yes I mean the change in PE of the electron.
So because it is a negative charge (electron) and we are going against the field it will be POSITIVE work
but if it were a positive charge and we are going against the...
Just two quick questions
1. if you have a positive charge and a negative charge of equal magnitude and you pick a point directly half way between then
is the electric potential zero but the electric is not?? is that true? why?
2. if you take an electron and move it from positive to...
I have a quick question. How many number less than 100,000 are odd numbers but START with an even number??
I was thinking there are 50,000 odd numbers less than 100,000 but how many of those start with an even number?
thanks
After taking to someone they said that the 30 degrees will make a difference? That is counter to what I thought.
So I am guessing that the minimum length of the mirror will be
L = (2/Sqrt[3]) * height of person
I used Cos[30]= height/Length of mirror
is that even close?
if not any...
Homework Statement
If a plane mirror is hung at an angle of 30 degrees from the vertical toward the viewer. what is the minimum length that will allow the viewer to see the full body image if the line of vision can not be depressed below the horizontal. you may assume that the eyes are at the...
Maybe I am missing something but don't you just do
1+3sin(theta) = 1-3cos(theta)
Sin[x]/Cos[x]=-1
Tan[x]=-1
x= 3Pi/4 or -Pi/4
then plug this into r equation to find the corresponding r coordinate
In case anyone has not heard about the sad news that John Wheeler has passed away.
http://www.nytimes.com/2008/04/14/science/14wheeler.html?ref=science
http://cosmicvariance.com/2008/04/13/goodbye/