Physics, 18.04.2021 15:00 eleaanastasiawo
A sodium surface is illuminated with light of wavelenght 300nm. The work function of the metal is 2.4eV.
1. Determine the K. E
2. The cutt-off wavelenght of sodium
Answers: 2
Physics, 21.06.2019 17:00
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.
Answers: 1
Physics, 22.06.2019 00:40
The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.
Answers: 1
Physics, 22.06.2019 23:00
In which of these cases are the two wave points considered to be in phase with each other?
Answers: 1
A sodium surface is illuminated with light of wavelenght 300nm. The work function of the metal is 2....
Mathematics, 11.03.2020 04:25
Mathematics, 11.03.2020 04:25
Physics, 11.03.2020 04:25
History, 11.03.2020 04:25