Planet A should be Mercury, and planet B should be Venus
To calculate the threshold frequency of the metal we use the formula,
Also,
Here, E is the energy of electron per atom, h is plank constant.
Given, binding energy of electron or for one electron,, here N is the Avogadro constant and its value is , so and plank constant,
Substituting these values in above relation we get,
.
Thus, the threshold frequency of the metal is .
C.
With choice A - you can choose if you are being lazy. Choice B there are options to help control or manage stress. And choice D you are in control of if you have any conflicts with other workers.
Hope this helps.
Please mark as brainliest if this helps.
Answer:3.67 s
Explanation:
Given
Ball is thrown with an initial velocity of
As the ball moves upward it experience a declaration due to gravity which will slow down the ball
using
where v=final velocity
u=initial velocity
a=acceleration
t=time
Here
Answer:Atomic model keep changing because the electrons around the nucleus are not fixed and they keeps rotating or changing their position in valence orbits around the nucleus.
Explanation: