What is Physic: Definition and 221 Discussions

Hey guys, I'm really sorry if this is the wrong place to post but didn't know where else to post. I was wondering if anyone out there could give me questions so I can practise for gr 11 physics. Preferably: 1 Force Motion Question 1 Sound Question 1 Light (SALT) Question 1 Light...

Can someone help explain the idea behind solving this roller support question. I have the answer, couldn't figure how to solve it. I would greatly appreciate the detail explanation...:rolleyes:

Hi everybody. My physics final is right around the corner and i was just wondering if there was any good way to help prepare and study. Physics isn't the easiet subjects for me, i tend to over think problems and get myself all nervous. Please let me know if there are any problem solving...

Homework Statement The information was posted as an image http://img300.imageshack.us/img300/5259/question01em4.jpg Homework Equations The Attempt at a Solution This question is confused, I very much appreciate if some one can help. It is NOT a homework question, it was a problem in...

At school we have a problem to solve but i don't know how to solve this problem. Here is the condition:"Ball is throw vertical upward with inceptive speed v0.Of what height h the kinetic energy of the ball decrease two times? Resistance of the air is ignored." I am sorry if don't write it right...

What is the background physics of "bouncing a ball? Momentum and impulse are the background physics but is there any thing else?

What is the best way to study this subject?

A coal fired plant generates 700 MW of electrical power. The plant uses 5.8 * 10^6 kg of coal each day. The heat combustion of cal is 3.3 * 10^7 J/kg. The steam that drives the turbines is at a temperature of 320 C, and the exhaust water is at 45 C. Note: 700 MW= 7.0 * 10^8 J/s = 6.0 * 10^13...

1st year physics help - hot air balloons... see next post...

below are my posts on my homemade RPG i was planning, after endless disagreement for help because of the exploding part i have subsided to a normal model rocket, seeing as how i bought a d-class rocket engine anyway. so, I would just like some certain equations that would help me in my launch...

Here are some physics question i encounter in a book for physics olympiad. I couldn't work them out. Questions: 1) A particle moves along a straight line ABC with B being the midpoint between A and C. The acceleration of the particle from A to B is constant at a1, while its...

I need help coming up with all physics concepts dealing with the mousetrap car and I need the equations for those concepts. Plz Help Thnx

Hi everyone, i'm looking for some some practice questions for the OAPT contest...it really doesn't matter which contest it is, just some Gr. 11 contest questions, like the SIN one...thanks

Physic problem... springs A 700g block is released from rest at height Ho(initial) above a vertical spring with spring constant k=400 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 19.0 cm. How much work is done A) by the block on...

URGENT PHYSIC PROBLEM+Thermodynamic Experts ONLY go to http://www.xmission.com/~dmcguire/IBPhysics/Units/ThermalPhysics/ThermalPhysicsPracticeTest2004.pdf solve problem number 28. is the answer b or c? argument for b: b is the point of the highest pressure, and lowest volume in the...

I have this homework problem that I really need help on. Thank you for your time Train A is traveling down a long straight track at a speed of 30m/s. The train A is 0.40km long and the last car at the very end of the train has a cannon mounted on it. Neglect the height of the cannon with...

hi everyone please check if i was wrong. And I don't know how to find dx and dx and its magnitude, anyone have any idea? thanks here the question http://viethost4u.com/toan/physic1.GIF and here is my answer http://viethost4u.com/toan/answer.GIF

Hi! Just wanted to get some help from all you wonderful guys! Can anybody help me with providing a link to a website that has all weird and wonderful formula to work out stuff - you know the kind - with more greek letters than you would find in a greek book and all those other wonderful...

When reading advanced physics articles, I frequently find terminology that is inconsistent with basic physics definitions. For example: "pure energy". I have no idea what that expression means. I have read much about space-time, the arrow or time, etc, but no definition of "time". Where...

I need to know where to start, any good books to help out I'm taking a self study course. I have some study guide from Army education center. I am waiting for video course show up. How long would it take for an object dropped from the Leaning Tower of Pisa height 54.6 meters to hit the...

Good morning ; i'm an italian electronic technician , and i have spent many years studing various phenomenon of mistic and spirituality ... after years of study i have managed it , i have measured something and have the technical proof of my theory ... angels and demons exsist (don't think I'm...