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"""
"""
from ..unitquantity import UnitQuantity
from .angle import revolution
from .time import s, min
from .dimensionless import count
Hz = hertz = rps = UnitQuantity(
'hertz',
s**-1,
symbol='Hz'
)
kHz = kilohertz = UnitQuantity(
'kilohertz',
Hz*1000,
symbol='kHz'
)
MHz = megahertz = UnitQuantity(
'megahertz',
kHz*1000,
symbol='MHz'
)
GHz = gigahertz = UnitQuantity(
'gigahertz',
MHz*1000,
symbol='GHz'
)
rpm = revolutions_per_minute = UnitQuantity(
'revolutions_per_minute',
revolution/min,
symbol='rpm'
)
cps = UnitQuantity(
'counts_per_second',
count/s
)
del UnitQuantity, s, min
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