Question
In: Other
Slight wind of 2.2 m/s is moving over a human cheek of length .05m and is...
Slight wind of 2.2 m/s is moving over a human cheek of length .05m and is causing the skin to lose water. What is the thickness of the mass transfer boundary layer at half of the distance (0.025m) from the edge of the cheek surface over which this water loss is taking place? The viscosity of air can be assumed as 1.85*10-5 Pa.s, density of air is 1.2 kg/m3 and the diffusity of water vapor in air is 2.6*10-4 m2 /s. Temperature is 37C
Solutions
Amanda K answered 5 months agoRelated Solutions
- An 80 kg man stands in a very strong wind moving at 13 m/s at...
- An 80 kg man stands in a very strong wind moving at 13 m/s at
torso height. As you know, he will need to lean in to the wind, and
we can model the situation to see why. Assume that the man has a
mass of 80 kg, with a center of gravity 1.0 mabove the ground. The
action of the wind on his torso, which we approximate as a cylinder
50 cmwide and 90 cm long centered 1.2...
A 90 kg man stands in a very strong wind moving at 12 m/s at torso...
A 90 kg man stands in a very strong wind moving at 12 m/s at
torso height. As you know, he will need to lean in to the wind, and
we can model the situation to see why. Assume that the man has a
mass of 90 kg, with a center of gravity 1.0 m above the ground. The
action of the wind on his torso, which we approximate as a cylinder
50 cm wide and 90 cm long centered...
An 80 kg man stands in a very strong wind moving at 15 m/s at torso...
An 80 kg man stands in a very strong wind moving at 15 m/s at
torso height. As you know, he will need to lean in to the wind, and
we can model the situation to see why. Assume that the man has a
mass of 80 kg, with a center of gravity 1.0 m above the ground. The
action of the wind on his torso, which we approximate as a cylinder
50 cm wide and 90 cm long centered...
Air at 20°C and a velocity of 8 m/s flows over the 4-m length of a...
Air at 20°C and a velocity of 8 m/s flows over the 4-m length of
a 4-m wide single surface of a square plate whose temperature is
80°C. (For properties of air, use k = 0.02735 W/m·K, Pr = 0.7228, ν
= 1.798 x 10-5 m2 /s ) Given the above information, do the
calculations to answer the two MC questions below. Please clearly
show/discuss your solution method and calculations. A.
__________The rate of heat transfer, Q̇ , from this...
A potential wind turbine location has an average wind speed of 5 m/s at a height...
A potential wind turbine location has an average wind speed of 5
m/s at a height of 10 m.
A) Assuming a standard wind friction coefficient of 1/7, what is
the average wind power per area at the proposed tower height of 80
m?
B) If the proposed turbine has a cut-in speed of 4 m/s and a
furling speed of 20 m/s, how many hours per year is the windmill
not spinning (assuming Rayleigh statistics)?
C) Estimate the yearly...
A mass is moving at 10 m/s in the +x direction and it collides in a...
A mass is moving at 10 m/s in the +x direction and it collides
in a perfectly elastic collision with a mass of 4 kg moving in the
-x direction. The collision takes places in 0.22 seconds and after
the collision the mass that was moving in the +x direction is
moving in the -x direction at 8 m/s and the mass that was moving in
the -x direction is moving in the +x direction at 14 m/s. What is...
A mass is moving at 10 m/s in the +x direction and it collides in a...
A mass is moving at 10 m/s in the +x direction and it collides
in a perfectly elastic collision with a mass of 2 kg moving in the
-x direction. The collision takes places in 0.21 seconds and after
the collision the mass that was moving in the +x direction is
moving in the -x direction at 9 m/s and the mass that was moving in
the -x direction is moving in the +x direction at 13 m/s. What is...
A billiard ball A moving at a speed of 2.4 m / s bumps into a...
A billiard ball A moving at a speed of 2.4 m / s bumps into a
billiard ball B of the same mass, which
are at rest. After the impact, A moves at a speed of 1.4 m / s in a
direction that forms the angle 50 ◦
with A's original direction of movement. Determine the magnitude
and direction of B's velocity vector by
the impact. (Answer 1.8 m / s; 36 ◦)
A sailboat runs before the wind with a constant speed of 3.5 m/s in a direction...
A sailboat runs before the wind with a constant speed of 3.5 m/s
in a direction 28 ∘ north of west. You may want to review (Pages 89
- 92) .
How far west has the sailboat traveled in 22 min?
How far north has the sailboat traveled in 22 min?
A wing-body model is tested in a wind tunnel with a flow of 100 m/s at...
A wing-body model is tested in a wind tunnel with a
flow of 100 m/s at standard sea-level conditions.
The wing area is 1.5 m^2 and the mean aerodynamic
chord length is 0.45 m. Measurements of lift force, L, and moment
about the center of gravity, MCG are made using the wind tunnel
force balance.
The lead mass is removed and a horizontal tail without
an elevator is added to the model. The distance from the airplane
center of gravity...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Suppose Rialto is the only movie cinema in a small college town, so it is essentially...
- With VMI, members of the supply chain share planning, demand, forecasting, and inventory information.
- Large lots are desirable in supply chain coordination despite increasing holding costs.
- ***Convert the C++ to Python*** #include <iostream> using std::cout; using std::cin; using std::endl; int charClass; char...
- Make-or-Buy Decision Fremont Computer Company has been purchasing carrying cases for its portable computers at a...
- The following costs were incurred for the single product produced during the first year of operations...
- Non-constant growth model: Do=$2.00 required return on equity= 5% g= 9% n=1,2 g=7% n=3,4 g=3% n=5...
ADVERTISEMENT