An airplane flies 200 km due west from city a to city b and then 285 km in the direction of 34.5° north of west from city b to city c. in straight-line distance, how far is city c from city a? in straight-line distance, how far is city c from city a?

How many molecules are present in 3 mols of silicon dioxide (sio2)?

Which of the following is not a characteristic of s waves? a. travel slower than p waves. b. cannot be detected in locations more than 105° from an earthquake’s epicenter. c. travel through solids and liquids. d. only affect coastal regions.

Modern physics a photon emitted from an excited hydrogen atom has an energy of 3.02 electron volts. which electron energy-level transition would produce this photon? a. n=1 to n=6 b. n=2 to n=6 c. n=6 to n=1 d. n=6 to n=2 i chose b but the correct answer is d can someone tell me why? and what's the difference?