# Search results

1. ### Mass Spring System

Good day all, I've got a rather puzzeling question on hand that is part of my Dynamic project. I need to model the collision of two vehicles. Each vehicle is traveling head on to the other, and each one has a spring attached to its front. We can assume that the final velovity after collision...
2. ### Creating Gravity Waves

Has any reaserch facility in the world developed a way to create gravity waves, sizable ones? Regards, Nenad
3. ### Simple Integral w/ Trigonometric Substitution

Hello everyone, Im having some trouble with an integral. \int \sqrt{x^2 - 1} dx so far: x = sec \theta \frac{dx}{d \theta} = sec \theta tan \theta dx = sec \theta tan \theta d\theta now we substitute: \int \sqrt{x^2 - 1} dx = \int \sqrt{sec^2 \theta - 1} sec \theta tan...
4. ### Friction caused by a Fluid

I'm working on a fluid mechanics problem and Im not too sure how to approach it. There is a system with an inclined plane and 2 cubes, one attached to the other via a massless string and run through a massless pulley. One cube is dangeling down the vertical edge and the other is on the incline...
5. ### Friction caused by a Fluid

I'm working on a fluid mechanics problem and Im not too sure how to approach it. There is a system with an inclined plane and 2 cubes, one attached to the other via a massless string and run through a massless pulley. One cube is dangeling down the vertical edge and the other is on the incline...
6. ### Becoming a Pilot - what do you need?

Hello everyone, I have a question for you all. I am just wondering what you need to become a pilot in the big industry (flying Bowing 747's for a large scale airline). Some people tell me all you need is hours and experience on smaller scale planes and then work your way up. While other people...
7. ### Diesel Cycle - Heat Engines - Thermo.

Hello, If anybody could answer this question for me that would be great. I have been wondering about it all morning. In the Diesel cycle for heat engines, on the second stage of operation, the Volume increases while pressure stays the same. I understand how this can be accomplished by raising...
8. ### Diesel Cycle - Heat Engines - Thermo.

Hello, If anybody could answer this question for me that would be great. I have been wondering about it all morning. In the Diesel cycle for heat engines, on the second stage of operation, the Volume increases while pressure stays the same. I understand how this can be accomplished by raising...
9. ### Help - (Ideal gas temp problem)

Help!!!! - (Ideal gas temp problem) Im having a problem with this question, on my chem assignement. Here it is: Q: A rigid, constant volume box contains a monoatomic ideal gas initially at 20 degrees Celsius and at 200kPa. The box is completely insulated. A 100-watt electric heater is used...
10. ### Kinematics Problem.

hi guyes, I was wondering if someone could help me with a problem I had on a quiz. The question hes been puzzeling me for some time now. A ball is thrown upward in an open roof elevator travelling at 10m/s(elevator speed). The balls speed is 20m/s. How much time does it take for the ball to...
11. ### Kinematics Problem

Hello everyone, this problem may seem simple to all of you, but I seem to be having a mental block. My physics prof assigned some review last class and I seem to be stuck on this problem. Here goes: When a high speed train traveling at 161km/h rounds a bend, the engineer see that there is a...
12. ### Any Waterloo Engineers?

Im entering the Waterloo Mechanical Engineering program - Co-op. I was just wondering if there were any engineers on this site from Waterloo, in a similar setting.
13. ### Particle Physics?

hello everyone. I have a limited background in particle physics (books). I was wondering if someone can help me with definitions of what certain particles are and what their names pertain to. No need to explain basic stuff (protons, neutrons, neutrinos, electrons, photons, positrons, gravitons...
14. ### Waves of any sort do not transfer mass

Ive read that waves of any sort do not transfer mass, but only transfer energy. My question is why do I then float towards shore when at a beach and in the water. :uhh:
15. ### What is superfluidity/superconductivity?

could somebody give me insight on the subject please. :approve:
16. ### Will Hawking or Penrose ever win Nobel Prize?

my question is simple: Will Hawking or Penrose ever win Nobel Prize? And if yes, when do you think it will come.
17. ### Electrical power

me and my dad were having a conversation about nikola tesla last night and he was saying how todays world needs to invent a wierless source of electrical energy. Kind of like radio, but instead of getting a weak electromagnetic signal, you would get a strong powerful signal that could maybe...
18. ### Speed of light broken?

I had a question. I was wondering, special relativity says that the speed of light (c) cannot be brroken by anything or any force or signal. But I had a thought last night that has been boggeling me all day. Lets say that you have a solid meter stick, made of a totaly innelastic substance. The...
19. ### Black holes and the Chandrasekhar limit

I had a question, I was reading Stephen Hawhings book on the universe and black holes. I came on to a segment which I could not understand. In the book, it says that when a star runs out of its fuel and starts collapsing: "the matter particles get very near eachother, and so according to the...
20. ### Is evolution real.

can you bio pple help me. My brother and I were having a discussion, and we cannot resolve weather the humans and species in the world today actually evolved from other beings. I believe that the other species did, but I do not believe that for humans. Any help would be great.
21. ### Who here has a phd?

Im just curious who on this site is taking a university/college physics program or has a phd.
22. ### Did we go to the moon?

what do you people think? I dont think we ever did.