It can be shown that fick's law of diffusion can be adapted to find that the time for the first solute molecule to travel a distance list = l2/(2d). suppose the diffusion constant for molecules of some unpleasant odor in air is 1.8 x 10-5 m2/s. roughly how far will the odor travel in 60 s?

Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

What do you think car designers do if the damage caused by a crash test is too severe?