Homework Statement
http://session.masteringengineering.com/problemAsset/1515645/4/Steif.ch02.p28.jpg
Find the equivalent resistance between node A and B, knowing that Rab = Vab/Iab
Homework Equations
KCL and KVL, I know.
The Attempt at a Solution
There is nothing in series or...
Using the object-image relation formula (1/s + 1/s' = 1/f), the image from the first lens becomes the object of the second lens. I tried doing that, but I'm not sure which lens acts as the object, and would the first object distance be 17cm?
I used 25cm because that is the normal near point, and it says it in the problem statement. The total magnification = angular magnification * lateral magnification, where lateral magnification = s1'/s1
Since I know that the total magnification is 113.333 (as calculated in my original post), I...
Homework Statement
The eyepiece of a compound microscope has a focal length of 2.50 cm and the objective has a focal length of 1.5 cm. The two lenses are separated by 17 cm. The microscope is used by a person with normal eyes (near point at 25 cm). What is the angular magnification of the...
I need to design a a vehicle using only elastics and/or balloons as a source of energy, and the cost of the overall material must not exceed $20. Now, I am not asking you guys to do the work for me, but I need ideas because there is a catch. The vehicle must do a hairpin turn at a certain point...
Thank you :)
A lot of people in my class seem to be getting 23.7N for the axial force in AE, and they found that the joint is under tension. I don't see anything wrong with my solution so I'm keeping it.
I'm confused about one thing: how exactly do you know if a member is under compression...
Statics - Forces in a Truss
Homework Statement
http://i.imgur.com/NbZlc.png
Homework Equations
Equations of equilibrium (sum of the forces in all directions = 0, sum of the moments about an point = 0)
The Attempt at a Solution
My attempt: http://i.imgur.com/qlLCY.jpg
Hopefully...
Thank you very much! Turns out I didn't have enough knowledge on moments on Friday, so I wasted 2 hours trying to solve that question. It feels really satisfying right now though!