OOooooHhhhh!!! Physics?
822839
The net force is the volume of the balloon times the density difference between air and hydrogen (∆d) times g. From archimedes principle: the bouyant force is dair*V*g, the weight of hydrogen is dhyd*V*g, so the net force is the difference, or (dair - dhyd)*V*g =∆d*V*g.   The volume of the baloon is (4/3)πr^3.\n\nr = cuberoot[3*F/(4π * ∆d * g)]\n\nThis comes out 4.89 m
650067
dont worry about physics. review grammar instead. it's more important
901641
Someone posted the exact same set of questions a few days back, either here or on the physics page - you ought to be able to find the methods in the responses. Have a look.\n\n\nBest of Luck - Mike
172516
Sorry I'm not good in physics.\n\nAre you from the Philippines? For sure you are because you know Sandara Park.
179131
Try this:\nhttp://kr.cs.ait.ac.th/~radok/physics/f3.htm
980923
engineering\nteaching physics at a secondary or university level\nresearch
198521
Well i am taking physics class this semester and we have to use websit to do our home work so please go to\n\n\nwww.masteringphyiscs.com\n\nyou will find all the topic for physics 1, 2 and 3...\nif you need help to search for the any topics than contact me...
943651
I am pretty sure that if you looked in your textbook, it would give examples of this kind of thing, and from that you should be able to figure it out on your own. You're a smart kid, you are taking physics instead of some easy A class, now act like it, stop asking others to do your work, and try to solve it on your own.\n\n\nLong Live Jambi
34477
It is 'B'. But I don't understand why you put up this question under 'Physics'!
325774
http://en.wikipedia.org/wiki/Physics
857307
I think I know why your not getting the right answer..... it's the physics thing.\n\nAny Geography questions.... anybody.... Oh well.\n\nBy the way, "Nameless", who shat in your corn flakes??
293110
Best of luck to you!  I have a 20 page physics paper due after spring break!
678891
i agree with you. physics really makes you think critically (and its like more attached to the real world) it has lots of formulas to choose from but you need a very good analogy for it.\n\nbiology is next, what can i say? mitosis is really that interesting.\n\nbut chemistry???? who cares about octavian??? duh? i dont even remember any of it.!
1091280
There are many division in physics which division are you asking for?
607503
Science??????????????????
833474
What is what?? the magnitude?? the torque??\n\nfinish your questions
1130384
1. What is Physics and Who Uses It?\n2. Introductory Calculus\n3. Vectors\n4. Forces and Newton's Laws\n5. Kinematics\n6. Displacement Curves and Derivation\n7. Circular Motion\n8. Moments and Torque\n9. Work, Energy and Integration\n10. Momentum and Collisions\n11. Static Equilibrium\n12. Dynamic Equilibrium\n13. Moment of Inertia\n14. Gravitational Fields\n15. Electric Fields\n16. Static Electricity\n17. Resistance Ohm's Law\n18. DC Circuit Analysis\n19. Capacitance and RC Circuits\n20. Magnetic Fields\n21. Magnetic Force and EMF\n22. Inductance and RL Circuits\n23. AC Circuit Analysis\n24. Electromagnetic Waves\n25. Heat\n26. Thermostatics\n27. Thermodynamics\n28. Pressure\n29. Optics\n30. Modern Physics\n31. Quantum Theory\n32. Relativity\n33. Energy Conversion\n\nThese are my "on the fly" idea I may have forgot a thing or two and some topics can certainly be combined or separated, but I feel these to be the most important aspects of physics.