Technician A says that a radio may be able to receive AM signals, but not FM signals if the antenna is defective. Technician B s
1 answer:
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Answer:
8861.75 m approximately 8862 m
Explanation:
We need to remember Newton's 2nd Law which says that the force experienced by an object is proportional to his acceleration and that the constant of proportionality between those two vectors correspond to the mass of the object.
for the weight of an object (which is a force) we have that the acceleration experienced by that object is equal to the gravitational acceleration, obtaining that
For simplicity we work with
despiting the effect of the height above sea level. In this problem, we've been asked by the height above sea level that makes the weight of an object 0.30% more lighter.
In accord with the formula the "normal" or "standard" weight of an object is given by
when
, so we need to find the value of
that makes
meaning that the original weight decrease by a 0.30%, so now we operate...
now we group like terms on the same sides
we cancel equal tems on both sides and obtain that
Answer:
a
The rate of work developed is
b
The rate of entropy produced within the turbine is
Explanation:
From the question we are told
The rate at which heat is transferred is
the negative sign because the heat is transferred from the turbine
The specific heat capacity of air is
The inlet temperature is
The outlet temperature is
The pressure at the inlet of the turbine is
The pressure at the exist of the turbine is
The temperature at outer surface is
The individual gas constant of air R with a constant value
The general equation for the turbine operating at steady state is \
h is the enthalpy of the turbine and it is mathematically represented as
The above equation becomes
Where is the heat transfer from the turbine
is the work output from the turbine
is the mass flow rate of air
is the rate of work developed
Substituting values
The general balance equation for an entropy rate is represented mathematically as
=>
generally
substituting for
Where is the rate of entropy produced within the turbine
substituting values