can you give me questions in physics(problem solving)?

Question

I really need this today. thank you in advance for those who will help me.

Answer 1

I've got one of the hardest physics problem (the problem is made for a High School Level, however, the actual level of the problem is a university grade):

1.
http://www.ipho2006.org/docs/Theory/Questions/IPhO-37.Th1_final.pdf
solution:
http://www.ipho2006.org/docs/Theory/Solutions/IPhO-37.Th1-solve.pdf

2.
http://www.ipho2006.org/docs/Theory/Questions/IPhO-37.Th2_final.pdf
solution:
http://www.ipho2006.org/docs/Theory/Solutions/IPhO-37.Th2-solve.pdf

3.
http://www.ipho2006.org/docs/Theory/Questions/IPhO-37.Th3_final.pdf
solution:
http://www.ipho2006.org/docs/Theory/Solutions/IPhO-37.Th3-solve.pdf

and even, an experiment problem:
http://www.ipho2006.org/docs/Experiment/37IPhO_Expt_Q.pdf
solution:
http://www.ipho2006.org/docs/Experiment/37IPhO_Expt_A.pdf

Answer 2

Here is a really difficult one from refraction

A nail is fixed perpendicular to a circular woden disc at its center. The disc is floating in water in water with the nail downwards. What must be the ration of the longest possible length of the nail to the radius of the disc so that the nail is completely from air.
Given that the Refractive index of water is 3/4.
Ans = (7^1/2) /3

Answer 3

Here's one very tough from mechanics.

Find the relation between Young's modulus, Bulk modulus and Poisson's ratio. Given values are E (Young's modulus), G (bulk modulus) and μ (Poisson's ratio).
Answer: G=E/(2(1+μ)) or E=2G(1+μ)

It took me about a week to solve this in college year 1.

Answer 4

This is one of interest. If it is required to have an energy source in order to perform work, and the force of gravity performs work - what is its energy source/equation?

Answer at http://360.yahoo.com/noddarc

Answer 5

Here are some sites which may help you! Good luck!
http://zebu.uoregon.edu/~probs/
http://www.learning-physics.com/

Answer 6

i have a ques.about spectroscopy.what are term symbols in alkali spectra?

Answer 7

tell me from which topics do you need questions