Recent content by Fuego

Newton's second law: F = ma A safety belt decreases your deceleration, lessening the force of impact. A soft hammer would take longer to decelerate when you hit something with it, so it would exert a smaller force. The 'impulse equation' is I = mv - mu (i.e. impulse = change in...

I just finished my Physics A-level. Out of the five A-levels i did, physics was the most interesting after maths. A lot of it is just building on the stuff you do at GCSE (mechanics, waves, electricity etc), but some of the new stuff is very interesting (radioactivity, thermodynamics, quantum...

You might want to read this, it explains it better than I can.

If i take a 2microF capacitor charged to a p.d. of 50V, and a 3microF capacitor charged to 100V, and connect them in parallel with their positive plates connected, a) what is the equivalent capacitance of this combintation? b) what is the p.d. across each capacitor after they are connected...

Pardon the pun, but what's the difference between path difference and phase difference (when talking about interfering light waves)?

Ok, thanks people. I think I get it now.

Hey people, I'm doing some last minute revision for my physics A-level (not literally last minute, i have a few days till the exam) and I need something clarifying. The photoelectric effect is supposed to demonstrate particle behaviour of light. From what I have read, the energy of the...

I find myself continually referring to this: \int as the 'integral-symbol-thingy'. Does it have a name? I asked my math teacher; he said it has a name but he couldn't remember it.

when it comes to the matter of good and evil, you have to define what good and evil are. IMO 'good' is simply sacrificing your time/money/whatever for the benefit of other people, and 'evil' is harming other people for your own benefit. the difficult question is 'is it wrong to be evil?'. if...

IMO: there is no 'meaning' to our lives. we are part of this universe and we just exist. there is no 'meaning' just as there is no 'meaning' to the life of a star. a star is formed and 'lives' its life and it eventually dies. there is no meaning to it, it just exists. the only difference is...

gravity is a phenemenon. the effects of this phenomenon include energy being imparted to bodies, and force being exerted on bodies.

a lot of things in physics aren't exactly intuitive. our 'natural' ideas of how the world works are based on what we see in everyday life. we see rocks falling faster than feathers, so we assume rocks fall faster than feathers because they're heavier. air resistance is such a common thing, its...

i think the second of those options is impossible; how could an infinite universe be finite in matter? i think the last option has the most evidence to support it. if any of the big bang models are correct, the universe must be finite in size (and matter, i think). the universe can be finite...

what about a magnetically confined screen of charged smoke particles?

ah, right. i thought you were talking about an air defense fighter getting into close range with a detected stealth aircraft. if the stealth aircraft isn't detected in the first place then you're certainly right.