When light with a frequency f1 = 547.5 thz illuminates a metal surface, the most energetic photoelectrons have 1.260 x 10^-19 j of kinetic energy. when light with a frequency f2 = 738.8 thz is used instead, the most energetic photo-electrons have 2.480 x 10^-19 j of kinetic energy
using these experimental results, determine the approximate value of planck's constant.
express your answer using four significant figures.
Answers: 3
.
we get 
and for 
we get 
, so we have:
by substracting the first equation to the second:
Another question on Physics
Physics, 22.06.2019 09:30
Astone is dropped from a cliff and falls 9.44 meters. what is the speed of the stone when it reaches the ground? a. 13.6 m/sec b. 1.39 m/sec c. 185 m/sec d. 9.80 m/sec
Answers: 3
Physics, 22.06.2019 17:00
(a) if the pressure in gas is doubled while its volume is held constant, by what factor do (i) vrms and (ii) change? (b) is it possible to boil water at room temperature (20oc) without heating it? explain.
Answers: 3
Physics, 22.06.2019 18:30
Apiece of metal 75g at 110°c is dropped in a container with 500g at 20°c. the h2o if temperature is 24°c find specific heat capacity of metal
Answers: 3
Physics, 23.06.2019 02:00
Which of the following are molecules? a. al b. ag c. mgcl2 d. nacl e. c3h8
Answers: 1
You know the right answer?
When light with a frequency f1 = 547.5 thz illuminates a metal surface, the most energetic photoelec...
Questions
Mathematics, 05.05.2020 01:39
Mathematics, 05.05.2020 01:39
Mathematics, 05.05.2020 01:39
Mathematics, 05.05.2020 01:39
Mathematics, 05.05.2020 01:39
Biology, 05.05.2020 01:39
Mathematics, 05.05.2020 01:39
Mathematics, 05.05.2020 01:39
Mathematics, 05.05.2020 01:39
Mathematics, 05.05.2020 01:39
