Recent content by conkermaniac

I had read in a book that gravity decreases as you approach the center of the Earth because you feel only the Earth under you. What's all this about being pulled by gravity in all directions?

I've been informed of a certain ping-pong ball experiment, where you put a ping-pong ball into an upside-down container that's been cut open at the other end. If you then pour water on top of the ping-pong ball, the ping-pong ball will stay at the bottom.

This is a question that's been bothering me for a while. Archimedes's principle states that the weight of the water displaced is equal to the buoyant force. If a frictionless box sinks to the bottom of a lake, does it feel a buoyant force? Buoyancy exists because of a difference in pressure...

The Princeton Review book is excellent for quick review. I haven't used Kaplan's, but from experience with their SAT II Physics, their problems are easier than the ones that you will find on the actual exam. I have also heard that PR's problems are a bit easier too, but the review section is...

Perhaps it's just that I haven't mastered how to redraw circuits. Thanks again for all your help! :) Conker

Oh, I didn't see that 3 & 5 are in parallel. Yep, I understand what you're saying. Thanks for checking that one again. Just one last question...how do you identify two resistors that are in parallel, besides checking for a closed loop? While closed loops do allow me to identify resistors in...

Are you sure about that? The test that I got that problem from said that the answer was E: that all of the circuits could be reduced. :) I actually think that I understand the other three now. I would approach one of these problems the same way that you do (simplifying existing parts), except...

Doc Al and Vivek, thanks a bunch! I never realized that a closed loop meant that the two resistors were parallel. I guess that's the problem with my teacher not teaching us the fundamentals... I'm still having trouble figuring out how to redraw a circuit diagram that's simpler. Would you mind...

Crumbles, I think the world you're looking for is "invisible", not "imaginary". If a field is imaginary, that would be something we concocted to make a problem easier to solve. I believe that Gaussian surfaces would fall under this category. Also, I always thought Westinghouse was the...

Oops, I just noticed that there's a Homework Help zone! Could an admin please move this thread?

Resolving Circuits--a beginner Hi, I'm new to this forum, and I hope to both contribute and seek knowledge from this forum. You may be disappointed, given my lack of Physics knowledge, but I will try my best. :wink: Anyway, my question involves circuits. I understand how to resolve...