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Translational motion
x=xo+Vo+at2
v=vo+at
v2=vo2+2a(x)
v=2gh (when vo or v=0)
work
W=Fd cos

W=ΔK+ΔU+ΔEi
Power
P=ΔE/t
P=W/t
p=Fvcos
Impulse
Imp=FavgΔt
inelastic collision
Ρinitial=Pfinal
elastic collision
Pinitial=Pfinal
Kinitial=kfinal
radioactive decay
α24
β+1
positron and electron capture:
β-1
Pressure
F/A
specific gravitiy
Þsubstance/Þwater
gravity

potential
gravity=Gmm/r2

potential=-Gmm/r
Pressure in liquid
P=Þgy
bouyant force
Fbouy=ÞVg
Flow rate
Q=Av
Bernoulli's equation
K=P+½Þv2+Þgh

v=√2gh
Intensity

Decibals
I=½Þw2A2v         (w=v/r or 2πf)

β=10logI/Io
beat frequency
f1-f2 (absolute value)
doppler
Δf/Δfsource=v/c   (can substitute wavelength for frequncy)
harmonics
Force (electricity)
Kqq/r2

F=Eq
Electric field
E=kq/r2
electric potential
U=-kqq/r

u=qEd
Voltage
V=kq/r

V=Ed
ohms law
V=iR
resistance or capacitance
Reff=R1+R2 in series (capacitance is opposite)
power (electric)
P=iV
capacitance and potential
C=q/v
u=½QV
Vmax and imax
√2Vrms or irms
Force in magnetism
F=qvBsin
planks constant
E=hλ
focal point
f=½r
index of refraction
n=c/v
light between mediums
n1singø=n2sinø
power of lens
power= 1/f
power and image and object distance
1/f=1/do+1/di
magnification
m=-di/d0 or hi/ho
units of pressure
1atm=760torr=105pascals
hydrolics
F1d1=F2d2
real fluid
viscocity, compressability, turubulance and drag
as area of pipe decreases effect of viscocity increase
ΔP=QR (increase pressure difference between ends of pipe and resistance have effect on flow rate)
Stress and strain
stress= F/A

strain=Δx/x
Velocity of a wave on a string

sound waves
√elastic/inertial   (T/μ)

√β/Þ         (bulk mod/density)

or (pressure/density)

shallow waves

deep waves
v=√gy

v=√gλ/2
real images
+ and inverted, "eye" am positive that the image is real and inverted
x of y cards