?The same amount of chemical energy is contained in a given volume of wood, regardless of species.
Answer the following statement true (T) or false (F)
False
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What is the distance identified by balloon callout number 4?
a. 48 inches b. 26-3/8 inches c. 44-1/2 inches d. 36 inches e. None of the above
A recent attempt to circumnavigate the world in a balloon used a helium-filled balloon whose volume was 7240 m3 and surface area was 1800 m2. The skin of this balloon is 2 mm thick and is made of a material whose helium diffusion coefficient is 1 × 10?9 m2/s. The molar concentration of the helium at the inner surface of the balloon skin is 0.2 kmol/m3 and the molar concentration at the outer surface is extremely small. The rate at which helium is lost from this balloon is
(a) 0.26 kg/h (b) 1.5 kg/h (c) 2.6 kg/h (d) 3.8 kg/h (e) 5.2 kg/h
How will an extremely dirty air filter affect the amp draw of a PSC centrifugal blower motor?
A) The fan motor current is not affected by the air filter. B) It will cause the motor current to increase because it is working harder to move the air through the system. C) The motor will begin to draw negative amps due to the magnetic-thermal motor winding reaction to the increased temperature caused by reduced airflow. D) It will cause the motor current to decrease because the fan will be moving less air.
What is one time constant of a 4.7 ?F capacitor in series with a 22 k? resistor?
A) 1.03 ms B) 10.3 ms C) 0.103 ms D) 103 ms