Recent content by DAKONG

a_{ave} = \frac{\Delta v}{\Delta t} = \frac {v_{final} - v_{initial} }{t_{final} - t_{initial} } it is definition :wink:

short circuit

E_{k} = qV = q\frac{KQ}{r} find r q = proton (p) (move) Q = charge against proton (8p) in work or energy calculation not use negative

E_{k}^{max} = \frac{hc}{\lambda} - \Phi_{Cu} electron volt = electron voltunit W = FS W = qES W = q\frac{V}{S}S W = qV if you want to change eV unit to be Joule unit WorkJoule = charge of electronqoulomb x 1volt eV = another kind work unit (please review difinition of...

you miss substitution di = -10.0 m :biggrin:

the energy conservation formula refer in ideal why you test many times?... because there are manythings in reality such as force againts the wind or rusty of metal yes :!) maybe sound and heat

it should be Q=Mc\Delta T + ML if you melt solid to liquid Q=Mc\Delta T (unchange state) Q=ML (change state)

i think P+mgsinx-umgcosx=ma so.. it's nothing ; enhance force:rolleyes:

the movement 2 events equivalent displacement s1 = u1t1 + (1/2)gt12 s2 = u2t2 + (1/2)gt22 s1 = s2 u1t1 + (1/2)gt12 = u2t2 + (1/2)gt22 but substitute t1 by t2+1 (find t2) time of the second ball moving

1.constant velocity v = s/t (m/s) 2. it is Petagorus's rule when that must be perpendicular components if not be perpendicular use rhombus calculating

= 2sinx cosx = sin2x :zzz:

first find the electric current then use Ohm's law V=IR 500=I(106+103) I = ? 1 V = IR X - 0 = I(R2) 2 V = IR 500 - X = I(R1)

it is Wheatstone bridge http://en.wikipedia.org/wiki/Wheatstone_bridge

find couple moment?

find resistance between A & B :bugeye: I'm sure it's not 1 ohm but i don't know how to solve http://www.pantip.com/cafe/wahkor/topic/X5389102/X5389102-1.jpg