AME 101 Fall 2007
Problem Set #1
Assigned: 9/7/2007
Due: 9/14/2007, 4:30 pm, in dropoff box in OHE 430
Problem #1 (10 points)
The StefanBoltzman constant (usually given the symbol
σ
) for radiative heat transfer is
9.09 x 10
9
ft
lbf
hour
in
2
R
4
where R is Rankines, the USCS unit of absolute temperature. What is the
StefanBoltzman constant in units of
Watts
m
2
K
4
? All of the required unit conversions in the lecture
notes.
Problem #2 (15 points)
A quantity called Brake Mean Effective Pressure (BMEP) is often used to quantify the performance
of internal combustion engines. Its definition is
BMEP
=
2
P
V
"
where P is the engine power, V the displacement volume (units length
3
) and
Ω
is the rotation rate
(units 1/time).
(a) Show that BMEP does in fact have units of pressure (force/area)
(b) If P = 200 horsepower, V = 350 in
3
and
Ω
= 3600/min, what is BMEP in units of
atmospheres?
Problem #3 (25 points)
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 Fall '07
 Ronney
 Energy, International System of Units, Conversion of units, Internal combustion engine, Joule

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