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Consider a 300 mm x 300 mm window in an aircraft. For a temperature difference of 80°C from the inner to the outer surface of the window, calculate the heat loss through L = 10-mm-thick polycarbonate, soda lime glass, and aero-gel windows, respectively. The thermal conductivities of the aero-gel and polycarbonate are kag = 0.014 W/m · K and k pc = 0.21 W/m · K, respectively. Evaluate the thermal conductivity of the soda lime glass at 300 K. If the aircraft has 130 windows and the cost to heat the cabin air is $l/kW · h, compare the costs associated with the heat loss through the windows for an 8-hour intercontinental flight.
In a very busy off-campus eatery one chef sends a 217-g broccoli-tomato-pickle-onion-mushroom pizza sliding down the counter from left to right at 1.67 m/s. At what speed does it move
A textbook of mass 2.10 rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.180 , to a hanging book with mass 2.92. find the mmoent of inertia of the pulley about its rotation axis
A boat moves through the water of a river at 10-m/s relative to the water, regardless of the boat's direction. If the water in the river is flowing at 1.6-m/s.
If the only forces acting on a 2.0-kg mass are N and N, what is the magnitude of the acceleration of the particle
if the power generated by a turbine is 20kw, what is the equivalent horsepower of this turbine
Inside of a nucleus nucleons (protons and neutrons) are confined within dimensions of 15x10-15m. Treating nucleons are particles in an infinite well, calculate the lowest energy of a photon emitted due to transition of nucleons between nuclear energy..
at the surface of a freshwater lake the pressure is 106 kpa.a what is the pressure increase in going 34.5 m below the
A jogger accelerates from rest to 5.87 m/s in 3.53 s. A car accelerates from 21.3 to 34.7 m/s also in 3.53 s. (a) Find the magnitude of the acceleration of the jogger. (b) Find out the magnitude of the acceleration of the car. (c) How much further..
An athlete crosses a 29 m wide river by swimming perpendicular to the water current at a speed of 0.6 m/s relative to the water. How fast is the water flowing relative to the ground
monochromatic light vacuum 538 nm shines on a soap film n 1.33 that has air on either side of it. the light strikes
n a circuit, a current of 4A is drawn from a battery. The current then divides, What is the value of the other resistor
The magnetic field in the air gap between the magnetic poles and the armature of an electric generator has a flux density of 0.7T. The length of the wires on the armature is 0.5m. How fast must these wires move to generate a maximum EMF of 1.00V in e..
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