Recent content by ok123jump

That’s true, but given the nature of the question, I think it’s a bit too much to add this level of detail right now. I don’t think he’s working in different coordinate systems if he doesn’t have a solid understanding of unit vectors - let alone basis vectors. You aren’t wrong. I just question...

All of the above answers are great. The answer is in almost every definition, yes. A vector can be written as a sum of unit vectors, and those are still vectors. They are just 0 in all but a single direction.

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cowmoo32, Let's review what we have: \Delta V = 1030 = \Delta V_{1 \rightarrow 4} K = 5.1 s_{tot} = .002m s_{1} = .0005m s_{2} = .001m s_{3} = .0005m with, \Delta V = E \cdot s and \Delta V_{tot} = \sum^n_{i=1} \Delta V_i One accounts for the dielectric...

HallsofIvy, You're right. That was quite an error in my concept of inertia. The definition I found: Mathematically, the inertial mass is the "m" in \rho=mv This result makes sense as a "bodies tendency to maintain momentum" - the larger the m, the less of an impact a change in velocity...

We have two theories which essentially agree on the outcome. Newton's Gravity and Einstein's Curved Spacetime. If you had a closed Universe with two pool balls and no other matter, you would still have to worry about inertia. As such, there should be some critical value out in space where the...

I support what has been said by the previous posters. I would also like to add that Richard Feynman talks in-depth about his view of problems and how to view scientific results in his book "Surely, you must be joking Mr. Feynmann". You should check that out.

Ah, you're right, my mistake. Fredrick08, please ignore my answer =).

fredrick08, Yes, you have the correct answers in your 3rd post. Note that sin(90) = sin(\pi/2)= 1 . To answer why you were incorrect for the first part - recall that the Earth is curved and Newton's First Law tells us that the satellite should fly into space except that there is the force of...

alphysicist, Since the capsule is pressured to standard atmospheric pressure, this formula provides net force. If the pressure inside the capsule was not the same pressure as p_0 (atmospheric pressure in this instance) we would need to account for that in the p term - you're right. We...

"A" should stand for area. clope023, When considering the force of the water on an object (hydrostatic force), remember that the greater the area which the pressure acts upon, the greater the force. You would not expect a 34cm window to experience the same hydrostatic force as, say a 3m...

Why settle for less than being the next Newton? I didn't attend much high school - I went to college early; however, when I was there, I studied at my own pace. I was quite the fan of reading my entire textbook then sleeping through most of the lectures. Needless to say, I didn't make many...

Hydrargyrum, I am not normally provocative, but, I would like to point out an observation. I've looked through your comment history and have yet to find a single post which demonstrates your intelligence, skill or facts that you've remembered that are pertinent to solving advanced physics...

This constant comes from the derivation of the deflection of a coiled spring. By deriving the deflection, one can extract the spring constant k from the equation. The derivation of the equation for the deflection of a spring comes from Castigliano's theorem. See A. C. Ugural "Mechanical...

Savonnn, I think that this question is a difficult one to answer. For simple calculations, ignoring most of the thermodynamics effects of the bullet traveling through the water, we can assume that the water is the medium of consideration, mathematically model the geometry of the slug and use...