Physics, 23.07.2019 04:20 saifallahassefa
An electron is trapped in a oneādimensional box that is 551 nm wide. initially, it is in the =4 energy level but, after a photon is absorbed, the electron is in the =8 energy level. what was the wavelength of the absorbed photon?
Answers: 1
Physics, 22.06.2019 22:30
The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaĻv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and Ļ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and Ļ = 1.2 kg/m3.
Answers: 2
Physics, 22.06.2019 23:30
You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the personās average speed in kilometers per hour?
Answers: 3
An electron is trapped in a oneādimensional box that is 551 nm wide. initially, it is in the =4 ener...
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