Window Definition and 237 Threads

I was given 2 problems based on statics and I was wondering if anyone could help. Thank you - we just learned the concepts of statics TODAY and were given an assignment immediately, so any help would be appreciated. A window washer attempts to lean a ladder against a frictionless wall...

Homework Statement A Norman window has the shape of a rectangle surmounted by a semicircle of diameter equal to the width of the rectangle. If the perimeter of the window is 20 feet, what dimensions will admit the most light (maximize the area)...

Homework Statement A window has the shape of a rectangle surmounted by an equilateral triangle. Given that the perimeter of the window is 15 feet, express the area as a function of the length of one side of the equilateral triangle. Homework Equations Area of an equaliteral triangle ...

Homework Statement As you look out of your dorm window, a flower pot suddenly falls past. The pot is visible for a time t, and the vertical length of your window is L. Take down to be the positive direction, so that downward velocities are positive and the acceleration due to gravity is the...

Im not sure what this is: http://www.dumpert.nl/mediabase/1092641/c3edd207/curious_stroboscopic_effect.html Maybe this is an explanation for some sightings seen by airplane passengers. Or maybe it is an artifact of a bad videocamera and you wouldn't see it with the naked eye.

Is this method good for analyzing a pulse? Why is the averaging of the spectra good for noise cleaning? What's the criteria for defining how much windows in a set of data one should take? Anyone who clarifies this has a big thanks from me.

I have been creating simple programs from the hello world one to simple math and loops - all of a sudden when I went to practice more today my programs would be completed but the window showing the result would pop up and almost instantaneously close itself - in the end I can't see the result...

I open my window and now whenever I open or shut my bedroom door i slam it hard accidentally. There is less air resistance to my bedroom door.

Homework Statement A glass windowpane in a home is 0.62 cm thick and has dimensions of 1.0 m x 2.0 m. On a certain day, the indoor temperature is 25˚C and the outdoor temperature is 0˚C. a) What is the rate at which energy is transferred by heat through the glass? b) How much energy is lost...

Do any of you design engineers or informed laymen know why progressive tint window glass like that found in eyeglasses is not offered as an option? Aftermarket provides tinted glass but not progressive tinting. I must wear tinted glasses outdoors due to light sensitivity so I wear progressive...

Homework Statement a gothic window it to be built with 6 segments that total 6m in length. The window must fit inside an area that is 1m wide and 3 meters tall. the triangle on top must be equilateral. What is the maximum area of the window. Homework Equations The Attempt at a...

http://yahoo-ans.com/U37HySkeeghwAMrrjT7Ix5XNG_ylv3qid20100228182319AAg_nhakhoa_SQr5/ i tried it all i think but a lot that's online right now only seems to work on XP not vista well this is what i tried so far you tell me what to do know! here my list of failures lol... i went to...

SoRry But I Have An a PrOblem To start WIth this... A boy is at a distance d = 6m from the base of a building attempts to throw a ball through a window size that H = 90cm at a height h = 8m. if the ball's initial speed is v0 = 15m / s, determine the range of initial angles Ø0 allowing the...

Vacuum Physics? I would like some clarity on a problem I think is attributed to a vacuum space. This is what happened...I have a small room that is 7' x 10', there are two metal doors directly across from each other on opposites sides of the room. It seems that when I want to close the door...

Hi. i wrote a script that finds the definite integral of a function using simpsons rule. right now the function to be integrated is defined as 2*pow(9-pow(x,2),.5). but this is very inconvenient to me because i must edit the program each time i want to find a new integral. my question is how...

Homework Statement a research submarine has a 20 cm diameter window 8 cm think. the manufacturer says the window van withstand forces up to 1x106N. What is the submarine's maximum safe depth? Homework Equations p = po + \rhogd The Attempt at a Solution p = F/A = 1X106 / 0.03 =...

Homework Statement In a sticitly scientific experiment, a student athlete throws rocks out the window in all directions. All rocks have the same initial speed V. It turns out that all rocks' landing velocities make angles theta or greater with the horizontal. Find height h of the window above...

Homework Statement http://www.cramster.com/physics-answers-5-653651-cpi0.aspx Homework Equations F=ma The Attempt at a Solution I tried seven times and all my entrys have been wrong. Please help me.

1. Homework Statement A research submarine has a 40.0 -diameter window 8.30 thick. The manufacturer says the window can withstand forces up to 1.00×106 . What is the submarine's maximum safe depth? 2. Homework Equations p=Po + pgh3. The Attempt at a Solution p = 1.01x 10^5 + ? X9.8 x 8.3 i...

Homework Statement A window washer of mass M is sitting on a platform suspended by a system of cables and pulleys as shown . He is pulling on the cable with a force of magnitude F. The cables and pulleys are ideal (massless and frictionless), and the platform has negligible mass.Find the...

Hello there! It's been about a grillion degrees up here in my home town recently and last night this led me to a sort of conundrum. If I open the window in my room but leave my door shut, hardly any air comes it at all. If I open my door, there's a strong puff of wind that comes into the room...

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Out the window[/color][/size] Interpret as you will [SIZE="4"]Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the contest period. In case there's a gray area, or you're not sure if the picture is suitable, check with me first...

Homework Statement Sounds like the beginning to a bad joke right? Two long straight wires pass through a window frame (1m x 1.5m). One wire carries 1A out of the room and one wire carries 8A in. Find magnitude of closed integral of vector B * vector dl around window frame. Answer in...

As you look out of your dorm window, a flower pot suddenly falls past. The pot is visible for a time t, and the vertical length of your window is Lw. Take down to be the positive direction, so that downward velocities are positive and the acceleration due to gravity is the positive quantity g...

1. A boy can throw a stone at 14 m/s. At what angle must he throw it in order to hit a window which is 10m away horizontally and 5m above the ground? 2. I would assume we have to use trig ratios and the kinematics equations. v = u + a.t v^2 = u^2 + 2.a.s s = u.t + 1/2.a.t^2 3. Diagram: (see...

Homework Statement A window washer of mass M is sitting on a platform suspended by a system of cables and pulleys as shown. He is pulling on the cable with a force of magnitude F. The cables and pulleys are ideal (massless and frictionless), and the platform has negligible mass. Homework...

A window cleaner of mass 95 Kg places a 22 KG ladder against a frictionless wall, at an angle 65 degrees with the horizontal. The ladder is 10 m long and rests on a wet floor with a coefficient of static friction equal to 0.40 What is the maximum length that the window cleaner can climb before...

Homework Statement a norman window has the shape of a rectangle surmounted by a semicircle. A norman window with the perimeter 30 ft. is to be constructed. a.) find a function that models the area of the window. b.) find the dimensions of the window that admit the greatest amount of light...

I live in a studio apartment over a busy city street. About 99% of people who walk by stare into my apartment and focus on me. I've been pretty good at ignoring this, but after a year, it's taking a toll. About an hour ago, some guy was standing out there with his wife/gf, and pointed at me over...

This is a problem from Halliday, Resnick, and Walker. My solution gets the correct answer, but it seems very extremely complicated and I think there is an easier way to do it. Homework Statement A cat spots a flowerpot that sails first up and then down past an open window. The pot is in...

I'm trying to get some software working to automatically download podcasts to my girlfriend's PC. The problem is that the window for setting options is too big, so not all of it is accessible. In particular, the "OK" button is off the screen, so I can't save the options. D'oh! I've been...

Hi all, I am currently looking into the energy correction factor of the Hann window. So far I have found that to correct for the application of Hann-window and Fourier transform the result needs to be multiplied by sqrt(32)/sqrt(3). Can any of you explain how to get that factor ? The...

http://img409.imageshack.us/img409/4825/sdfsbe9.jpg i am getting this error when i simulated the above circuit what could be wrong **** CIRCUIT DESCRIPTION ****************************************************************************** ** Creating circuit file...

I've searched this sight but to no avail. I am wondering how can i implement printing capabilty in my MFC dialog window. I've tried creating a SDI with the CFormView Class, but there is no printing support that way. If I try to make a Dialog-Based Application the "Standard Toolbar" option cannot...

[SOLVED] Computer Help! When i minimize any of the windows it just dissapears and does not show on my taskbar! Any help would be great =/

Here's a java applet that shows the electric field of a moving charge (it's actually incorrect, it only gives a rough idea how motion and acceleration affect electric field). http://www.cco.caltech.edu/~phys1/java/phys1/MovingCharge/MovingCharge.html Can a java applet like this be the same...

Homework Statement A window washer pulls herself up using a pulley-bucket apparatus. How hard must she pull downward to raise herself slowly at constant speed? The mass of the person plus the bucket is 75 kg. Homework Equations F=ma The Attempt at a Solution I don't know what I'm...

Homework Statement An airplane is flying at an elevation of 12500 m. The window on an airplane is a square of length 0.115 m on each side. What is the net force on the window? Homework Equations P = Po + pgh p = 1.26 kg/m^3 Pair = 101.3 kPa The Attempt at a Solution I thought...

I've got two equations that i want to put into a matrix and solve for Va and Vb: 1.7ma = (1/5k + 1/20k) -1/20k Va -2ma = -1/20k (1/4k + 1/20k) Vb The answers I got were Va= 5.655v and Vb= -5.724 then, using I= (Vb-Va)/R ----> (-11.379/20k) = 0.65ma...

I'm doing research on window functions (such as: rectangular, Hanning, Blackman, etc), but am having trouble with respect to the energy loss associated with each. I know that applying the window causes energy loss in the spectra of interest, and for the Hanning Window and Hamming window...

Ok this might be a simple problem but i have no idea how to do it; A stone is dropped from a window 5m high what is its speed when it hits the ground. I don't need answer i just need a formula or some guidence Thanks

I just noticed that there's a tiny blue window that comes when I start my computer. It goes to the top left corner so it's very easy to miss (it's def. trying to hide). I saw it before but I thought it was something in the background...I pulled it today by accident and realized it's a window...

I'm looking for a complete definition of the switching window in the context of comparators. In particular, I want to make sure I'm not misunderstanding how hysteresis is implemented in the AD630 (Analog Devices) chip. http://www.analog.com/UploadedFiles/Data_Sheets/AD630.pdf See page 2, in...

Could anyone give me help on these problems thank you. 1. An object falls from height h from rest and travels 0.46h in the last 1.00 s. Find the height and time of its fall. Explain the physically unacceptable solution of the quadratic equation in t that you obtain. I think this problem...

Using Latex on PF has now never been easier! Thanks to the hard work of member https://www.physicsforums.com/member.php?u=40201". For the meantime I am interested in any performance issues you may have related to the feature.

Okay, for the moment, forget about time dilation. Are the following descriptions accurate if you do not account for time dilation? I've been going over and over this in my head and I can't figure out why any of these don't make sense. Setting: A ship going .99c. 1 Attached to the...

I have a signal and it oscillate bewteen 0 and 10V for 400ms when triggered. What is the easiest way to design a circuit that look for the first low of the pulse and output a high for 100ms while ignoring the pulses in the last 300ms? I prefer not to use uC. Thanks, David.

As Latex gets to be more popular on web forums a nice feature would be able to display a list of the most common Latex commands in a window, for reference. I've been working on a plugin for vBulletin which adds this capability. I wanted it to have minimal impact on a forum, so that it's...

How is it called? (the "window pane blackboard") Hello everyone, that's one terrible flat question I'm asking here, but do you know what is this super stylish blackboard that isn't black but transparent, exactly like a grand window pane? Any movie with some science in it has it. They write on...