2. Estimate the value of mass transfer coefficients, kc and kG, in large of stream of air at 273K flowing in a duct past the flat plate of solid naphthalene with length of 40 cm. The velocity of the air is 0.82 m/s at 273K and 1 atm abs. The diffusion coefficient of naphthalene in air at 273K and 1 atm abs is 5.16x10-6 m2 /s

real, smaller and upside-down.   so the answer should be b.

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;