What is mass diffusivity?
What will be an ideal response?
Mass diffusivity is the empirical parameter which is a measure of the amount of
mass or molar diffusion occurring down a density or concentration gradient.
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Consider two blocks, one made of wood and the other of lead. They have the same dimensions but the lead is much more massive. If they are dropped and fall long enough to reach terminal velocity, which block experiences a larger force from air resistance?
A. The lead block B. The force on each is equal C. The wood block D. It isn't important because air resistance can be ignored
The primary winding of an electric train transformer has 400 turns and the secondary has 50 . If the input voltage is 120 V (rms) what is the output voltage?
a. 15 V (rms) b. 30 V (rms) c. 60 V (rms) d. 2.4 V (rms) e. 960 V (rms)
RLC Circuits: A series circuit has a 100-? resistor, a 0.100-?F capacitor, and a 2.00-mH inductor connected across a 120-V rms ac source operating at 1000/? Hz. What is the rms voltage across the inductor?
A. 120 mV B. 87.1 mV C. 302 mV D. 96.1 mV E. 200 mV
An arrow is shot straight up. At the top of its path, the net force acting on it is
A) instantaneously equal to zero. B) greater than zero, but less than its weight. C) greater than its weight. D) equal to its weight. E) horizontal.