Recent content by thehammer

Hello everyone, I have been on a physics degree course for the past 4 months. This semester we have started a practical techniques module. In my first semester the classes I took were all theoretical. I had very few problems understanding and implementing the concepts covered and things...

Homework Statement Three uniform rods, each of length L = 22cm, form an inverted U. The vertical rods each have a mass of 14g; the horizontal rod has a mass of 42g. What are (a) the x coordinate and (b) the y coordinate of the system's centre of mass? Homework Equations x(com) = 1/M...

I hope so. This problem was really getting at me earlier when it shouldn't have been because of its simplicity!

Chapter 7, question 9. I sincerely hope I didn't write the distance down incorrectly, haha. I'm fairly sure I didn't.

The question is from "Fundamentals of Physics, 7th Edition," Halliday, Resnick and Walker.

I did what you suggested and got the question right. Thank you Doc Al. I've a few of questions about this problem. If the acceleration is not constant then it follows that the force must be variable. This contradicts the first part of the question in which it is stated that the force is...

Homework Statement A 3kg body is at rest on a frictionless horizontal air track when a constant horizontal force F acting in the positive direction of an x-axis along the track is applied to the body. The force F is applied to the body at t = 0 when the body is at the origin. A stroboscope...

Oops. I apologise for wasting time. I used a current from a different question by accident :).

Homework Statement A 200-turn solenoid having a length of 25cm and a diameter of 10cm carries a current of 0.29A. Calculate the magnitude of the magnetic field B inside the solenoid. Homework Equations B = \mu0ni The Attempt at a Solution Well, I plugged the numbers into the...

I did A-level physics last year (finished in July). Now I'm doing physics at university, so some knowledge of the topics I studied at A level has been retained. If you think I could help you, contact me or post a link to your report on here.

Homework Statement Three plastic sheets that are large, parallel and uniformly charged are placed side-by-side. The electric field strength between sheets 1 and 2 is 2x105; the electric field strength between sheets 2 and 3 is 6x105. What is the ratio of the charge density on sheet 3 to that on...

That's what I was thinking. I'll have an attempt at Redbelly98's suggested solution and see if that leads to your answer.

Hopefully I've thought along the right lines... The maximum height of water one cylinder could contain is 1.560 m + 0.854 m = 2.414 m. If both cylinders are to equalise, they must contain the same mass, and hence volume, of water. This requires them to have the same height of water which is...

Homework Statement [This probably seems really easy to the physics whizzes out there but...*blushes*] Two identical cylindrical vessels with their bases at the same level each contain a liquid of density 1.30x103 kg/m3. The area of each base is 4.00cm2, but in one vessel the liquid height is...

I am from the UK and am about to start my degree in Physics in approximately 25 days. At the moment I am very eager to do as well as I possibly can and would like to do some preparation. Would anyone be so kind as to suggest some things that I ought to read before I begin?