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Mechanical vibrations
Energy flow
energy transmitted through surface S for time t
W =
J
x
mJ
J
kJ
MJ
GJ
TJ
density of medium
ρ =
kg/m
3
x
kg/m
3
kg/dm
3
g/cm
3
t/m
3
kg/l
3
g/l
3
g/ml
3
maximal value of vibrational speed
V
m
=
m/s
x
m/s
km/h
cm/s
ft/s
kn
area of surface
S =
m
2
x
mm
2
cm
2
dm
2
m
2
km
2
a
ha
in
2
ft
2
yd
2
phase velocity of wave
c =
m/s
x
m/s
km/h
cm/s
ft/s
kn
time
t =
s
x
ps
ns
μs
ms
s
min
h
d
y
1. Define values of all variables, besides sought quantity
2. Change units if necessary
3. Click "Calculate"