Recent content by Elkay

Thank you for the replies and corrections. I don’t quite get everything, but I am trying. :) … Okay. So going by what you said --(not looking at time): If I am to just focus on the radius and mass, then by making the radius of the platform larger would place the large masses (M) farther...

Recently had a lab on Rotational motion and mass distribution (strange as it wasn’t covered in class yet), and there were a few questions I needed to answer. I’m doing my best to understand the lab and concept, and I was hoping that someone could possibly broaden my understanding and tell me if...

I performed a lab where I had to find the acceleration of two masses that were connected by a string and hanging on a pulley. The equation used was: http://home.earthlink.net/~copper017/Random/PhysicsLab/acceleration.jpg After performing the calculations I got the following data...

Thank you so much. I think I got the right answer: http://home.earthlink.net/~copper017/Random/final1.jpg Since T1=T2=T, then: http://home.earthlink.net/~copper017/Random/final2.jpg So I guess the key to solving a problem like this is to recognize that the forces are in equilibrium, and to...

Hmm, if I don't consider the weight, just look at the \sum F_y equation and solve for T1, the answer I got was -5... http://home.earthlink.net/~copper017/Random/revise.jpg

Hi Sciencewiz, From what I've read in my text, if you want your projectile to go it's maximum range, the angle you should use is 45 degrees. We (my group) used PVC pipes and an air compressor-- our marshmallow flew beyond 100ft! This is a really cool assignment but I was robbed of much of the...

Due to a jaw injury, a patient must wear a strap (see the figure) that produces a net upward force of 5.00 N on his chin. The tension is the same throughout the strap. To what tension must the strap be adjusted to provide the necessary upward force? Here's the picture: I think the...

Oh, I don’t know how to calculate that. But I’m thinking if I check the gauge from the pump and keep within the allotted amount of pressure from the PVC pipe, then it should be okay. Thanks for that tip-- I didn't know about the PVC pressure rating. :smile:

My engineering assignment calls for me to create a launcher that will propel a jumbo marshmallow at a target 50 feet away. I’m really excited about this assignment since this will be the first thing I’ve ever constructed on my own, but I’m unsure about finding inexpensive materials (my launcher...

*sigh* That's the problem. I don't know where to start or what I need to use to get the problem, so I can't show work. I'm sorry if I gave the impression that I want someone to solve the problem for me- if I wanted the answer, I could easily just copy the answer from a classmate instead...

I'm working on a prelab assignment and couldn't remember exactly what to do in order to solve the following problems. Any help would be greatly appreciated: a. If 4.0 ml of 0.3M of KI is mixed with 1.0 ml of deionized water, 1.0 mL of buffer solution, 1.0 mL of 0.2 M Na_{2}S_{2}O_{3}, and 3.0...

Elkay is a female from Central Florida, USA. There's quite a few Floridians here on the forums. I'm surprised.

I was given an assignment dealing with finding standard deviation. From the example given, I was able to do the assignment and get the correct answers, but I still don't understand standard deviation or its importance. Could someone explain standard deviation to me, or at least point me to...

My favorite topic in physics would be any I can understand (in my case, none of them), and my most hated are those that I cannot comprehend (almost all topics covered). :wink: I'm sorry, but I've failed my physics class and have to retake it all again next semester. :frown:

I'm more than happy to help the forums in any way I can. Wish I could do more, but being a poor college student, there is only so much one can do...