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the first is more efficient in your thinking about self sustaining as the second one needs manual labour but it is obvious that the second one will more more efficent in terms of conservation of power due to the closeness of the coils btw i have seen the first one in action so it does indeed...

its official the only thing in a school lab concerning eletricity that can kill you besides sticking your hands in a power point is and induction coil 10000 V is dangerous no matter how lil current there is

answer is b remember you are throwing off a cliff, if you throw it up it will be under the affect of gravitation so if you think about it carefully v = u + at because its under a for a longer amount of time it will accelerate more and therefore will have a greater velocity

out of the palm ... another way of thinking of it is the right hand push rule f = qv x b thumb is v fingers are b palm is f you are pushing in the direction of the force f = il x b thumb is i fingers are b palm is f

hmm physics made fun ^^ random outbursts of "strangers in the night" in a horrible singing voice jokes dropped here and there as for the content we go through the theory and more XD goes into a bit too much detail sometimes but i guess it will raise our standard of answers we ourselves have to...

wellid say you'd need to break down the entire equation and evaluate it action at a distance point of view ie F = GMm R2 where M is the mass of the Earth and m is mass of the satellite F gives the force experienced by the object of mass m at a distance R from the center of the...

if you look around there are some great resouces posted by some hard working members which cover every aspect of this question XD they can be found here http://boredofstudies.org/view.php?course=11

well the water in the sea water will have a boiling point of approximately 100 (as addatives will affect boiling points...) this will result in the water being boiled out and then condensed so i guess a propety is low boiling point

as for examples of those seiving - sand/rocks fractional distillation - crude oil to various carbon chains filtration - salt water/sand boiling is another technique but im sure theres a technical name for it

http://en.wikipedia.org/wiki/Polyhydroxybutyrate wikipedia ... the lost mans source of information according to the site there are various forms so i'll leave you to find the one you want

well wouldnt it be best to describe the current applications? and before moving onto the 'potential' future uses of the batteries? take the button cell for example at the moment because of its small size it can be used in small appliences and gadgets. currently used in items such as hearing...

actually its not that bad when you actually get into it .... you might feel the 'stress' at first but then you'll get used to it and it'll be an everyday thing

ohms law .... potential difference (V) is proportional to the current (A) in a series circuit so basically V=KA where K is a constant which varies depending on the circuit ohms law takes this and says that K = R(resistance of the circuit) so basically you end up with V=RI

all possible but F as it must have speed of somesort .... unless of course there is an unmentioned acceleration to balance out the acceleration to the right which would result in zero acceleration = zero speed backing up forevaunited XD (didnt see his post till i finished typing ..)...

short version. faradays experiment showed that should a conductor cut lines of flux it will induce an emf longer version should a conductor cut lines of flux it will experience a change of flux, a change of flux results in a seperation of charge. a seperation of charge results in an emf and...

actually .. we would move .... we would go splat >< and we would feel lots of attraction to other objects .... *imagining human magnets*

i dont know about the other guys f3nr15 but at my school we do motors/generators before doing space... maybe the other schools are like this too

sorry but im gonna have to refer you to the other thread you made in physics since its pretty much the same thing http://community.boredofstudies.org/263/space/129516/assessing-reliabilty-validity-secondary-source.html

well in terms of energy and force energy: potenial energy force: gravitational force take points: on surface of earth in orbit at 40,000km on moon

*EDIT (due to mistake found by helper)* eerrr technically a dc* motor is a combination of: a rotor an armature a stator (usually the magnets) a coil a power supply a split-ring commutator some carbon/copper brushes and involves taking electrical energy and transforming to mechanical energy...