Mass and balance

Classified in Physics

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speed = distance/ time

acceleration=change n velocity/time
scalars=magnitude=time speed distance energy
vectors=magnitude and direction=displacement velocity acceleration force
force=mass x acceleration
weight= mass gravitational field strength 
energy=charge x voltage=e=Q x v
power=current x voltage=P=IxV
energy=current x voltage x time 
voltage=current x resistance
current=charge/time
power=energy/time
total resistance=add all resistance together
units
current (i)=ampere(A)
charge(Q)=coulomb(C)
energy(E)=joule(J)
resistance(R)=ohm
time(t)=seconds(s)
voltage(V)=volt(V)
power(P)=watt(W)
frequency=1/time
speed=frequency x wavelength 
n=sin i/sin r= refractive index
n=1/sin c=total internal reflection 
efficiency=useful energy output/ total energy output

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