Recent content by asa!!

my problem is that for the second question i calculate the new pressure of the air inside the tube but since i do not know the consistency of the air at that temperature how can i find the effective speed.?(hope it is the correct term) And also at the first question i do not know the starting...

sorry but my english are not so good.does the term effective speed helps?or else i want to find the square root of the average values of speed square.i am not sure how is ti called in english.

in adition for the activated speed i have to know the pressure and the concentration of the air in order to calculate it?

thanks for your help.one question.at the first question when you say that the N changes what do you mean?how can the amount of moles inside the tube change because of the heating of the tube?

please give me a hint!i need to have it solved until tomorrow morning.please help

i was thinking about the above problem for the first question to simply calculate the new V of the air assuming that the pressure is constant before and after the heating and that the pressure equals i atm same as the one existing in the atmosphere.then if i use that the consistency of air is...

Hi to you all.i have an exercise i cannot solve.i think something is missing. Cylindrical tube V=10L opened at the top has air with a temperature of T1=27 oC.We provide heat to the tube until the temperature reaches the value of T2=327 oC.A)we have to find the amount of air that leaves from...

Hi to you all.i have an exercise i cannot solve.i think something is missing. Cylindrical tube V=10L opened at the top has air with a temperature of T1=27 0C.We provide heat to the tube until the temperature reaches the value of T2=327 oC.A)we have to find the amount of air that leaves from...

at a distance of 12,673m it captures an object with length of 10,350m.so i found that tha fov is 44 degrees.i think i am right no?thyanks

hi again.please help.in order to find the FOV of the camera does the capture photo has to be always in focus?because i have taken a fiew measurements and not all were in focus.then i calculated the FOV as the average value of the field of view of each.please help

may be you used the entire width of the picture provided?because a divided with two in order to obtain have of it for my calculations.then the angle i double it

actually i have doubled it.may be the reason is that i use a mobile for the capturing of the images?

thanks.one last question.how did you find the field of view that is 80 degrees?i found it around 44 degrees.thanks

this foto is when the object is at three cm away from camera.it is blurry because i have added a lens that is blury in front of the camera.i only care for an aproximation of the distances.thanks

to tell yo the truth i am completely confused.i have a mobile camera.the resolution of the photos it captures is 640x480.what does this mean?that on the horizontal axis it uses640 pixels and on the vertical 480 pixels.am i right?since i know that the actual width of the object, let's say a wall...