Recent content by gibxam

Hello everyone, I've been in university for about 3 years now and the tool I want more than anything is something that can make plots symbolically. What I mean is if for example i have the following function: f[x]=ln[\frac{x}{β}] I want a plot that will know to plot a function that is...

Suppose I drop a rock off a cliff at height h. As it falls, I snap a million photographs at random intervals. On each picture I measure the distance the rock has fallen. Ignoring air resistance: x(t) = 1/2 g t^2 v(t) = g t total flight time = T = Sqrt[ 2 h/g] My confusion is that in...

If I'm given a set of vectors {-4; 3; -10} = v1 {2; -2; -3+k} = v2 {2; -6; 14} = v3 I want to find that they are linearly independent if and only if k != something to solve this is simple but a huge tedious pain (although not nearly as tedious as trying to find a solution to this...

Hey I'm just wondering where did you get this quesion from because this was on my midterm and if there's a database of these questions I'd like to study from them

Hello I am going to be trying to make a capsule to protect an uncooked egg from being dropped from approximately 12 feet. There will be a parachute attached to the top when it is dropped. The capsule should be made of raw materiel such as card board or paper and no food products can be used. I...

I'm trying to bring this thread back to life as I am still curious about the answer.

Gyroscopic Forces?? Is it possible to create an object that is basically a spinning top but because of the way it is made will spin forever? If not what would be the best design for a 'spinning-top like' object? I think I need to do some research on Gyroscopic Forces but I'd like to be pointed...

My apologies for coming off as rude Danger I will be more patient :)

Comon guys 91 views no answers? I'm going to do some more research on fluid dynamics and post about it but I'd really like to here at least where to start I did some reading and its difficult to know where exactly I should be looking.

Alright thanks for the input anyways Danger :)

Hey Danger, Thanks for the response but I'm still a little bit confused. How does altering the waveform force it rearward in a jet-like manner? Does this mean the the reason pumping works does not have to do with Newton's Third Law? Also could you elaborate on what you mean by a jet-like manner...

Hello PFers, I've been reading these forums for a little while, and now that I have my own question I thought I would register to the site :). My question is about pumping and Skimboarding. I understand that many of you (if not all) have no idea what skimboarding and pumping even is...