Answer:

Increase
Explanation:
q = Charge in the potassium ion = 
e = Charge of electron = 
= Change in potential = 
Change in electric potential is given by

The energy is 
The potential energy will increase.
Answer:
ok so youll tell me when you have problems
Answer:
The frequency of the green light is 
Explanation:
The visible region is part of the electromagnetic spectrum, any radiation of that electromagnetic spectrum has a speed of
in the vacuum.
Green light is part of the visible region. Therefore, the frequency can be determined by the following equation:
(1)
Where c is the speed of light,
is the wavelength and
is the frequency.
Notice that since it is electromagnetic radiation, equation 1 can be used. Remember that light propagates in the form of an electromagnetic wave (that is a magnetic field perpendicular to an electric field).
Then,
can be isolated from equation 1
(2)
Notice that it is necessary to express the wavelength in units of meters.
⇒ 
Hence, the frequency of the green light is 
From the calculations, the acceleration of the elevator is obtained as 1.5m/s^2
<h3>What is acceleration?</h3>
The term acceleration has to do with the rate of change of velocity with time.
Given that;
u = 9.2 m/s
v = 15.8 m/s
t = 3.8
a = ?
The v = u + at
a = v - u/t
a = 15 - 9.2/3.8
a = 1.5m/s^2
Learn more about acceleration:brainly.com/question/12550364
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Hello Again! I think the Answer might be 220 m! ( 1/2) ( 21 m/s + 0 m/s) (21 s) = 220 m