1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
emmasim [6.3K]
2 years ago
10

An electron is ejected from the cathode by a photon with an energy slightly greater than the work function of the cathode. How w

ill the final kinetic energy of the electron upon reaching the anode compare to its initial potential energy immediately after it has been ejected?.
Physics
1 answer:
Ksivusya [100]2 years ago
3 0

It will be approximately equal.

<h3>How will the final kinetic energy change?</h3>

We can infer that all of the energy in the electron is Potential energy (PE) because the energy provided by the photon is hardly enough to outweigh the work function.

It will gain kinetic energy (KE) as it advances in the direction of the anode because it is moving through an electric field. All of the PE will have been transformed to KE by the time it reaches the anode.

According to the question

K = hf - W

W = Work function

The energy of photons is comparable. After conversion, there was only a little amount of KE remaining.

Therefore, PE (W) essentially equals KE (K).

It will about be equal.

Learn more about work function here:

brainly.com/question/19595244

#SPJ4

You might be interested in
If the displacement of a horizontal mass-spring system was doubled, the elastic potential energy in the system would change by a
bixtya [17]

Answer:

K'=4K

Explanation:

The electric potential energy is given by :

E=\dfrac{1}{2}kx^2

Where

k is spring constant

x is compression or extension in the spring

If the displacement of a horizontal mass-spring system is doubled, x'= 2x

New elastic potential energy :

E'=\dfrac{1}{2}kx'^2\\\\E'=\dfrac{1}{2}k(2x)^2\\\\=\dfrac{1}{2}k\times 4x^2\\\\K'=4\times \dfrac{1}{2}kx^2\\\\K'=4K

So, new elastic potential energy 4 times the initial elastic potential energy.

3 0
2 years ago
A gamma ray and a microwave traveling in a vacuum have the same?
kaheart [24]
They have the same speed 
7 0
3 years ago
Read 2 more answers
How do I calculate the efficiency of motor
zepelin [54]

Answer:

the formula is efficiency = output / input × 100%

7 0
3 years ago
What does the equation n =Pout/Pin mean
V125BC [204]
<span>Basically, the variable n is equal to the amount of P out of the system divided by the about of P into the system

</span>
7 0
3 years ago
Read 2 more answers
What is static friction?​
givi [52]

Answer:

Plzzzzzzzzzzzzzzzz brainliest

Explanation:

In static friction, the frictional force resists force that is applied to an object, and the object remains at rest until the force of static friction is overcome. In kinetic friction, the frictional force resists the motion of an object. ... The frictional force itself is directed oppositely to the motion of the object.

7 0
2 years ago
Other questions:
  • An 80 kg man is standing in an elevator which is moving down and slowing down at a rate of 2.0 m/s2. how hard must the floor of
    10·1 answer
  • Which 2 elements are most likely to react and form a compound? why?
    5·1 answer
  • What is mean by the value of universal gravitional constant is 6.67×10^-11​
    9·1 answer
  • To subtract displacements, a ____________ needs to be set
    8·1 answer
  • What does the slope of a Position vs. Time graph represent?
    14·1 answer
  • Describe how elements are formed?<br>​
    10·1 answer
  • Choose the incorrect statement about the proton: Group of answer choices The proton has the atomic mass of 1 amu The proton has
    15·1 answer
  • What is the gravitational force of attraction between two asteroids in space, each with a mass of 50,000 kg, separated
    10·1 answer
  • Does the work required to lift a book to a high shelf depend on how fast you raise it? does the power required to lift the book
    6·1 answer
  • A 15.2 kg mass has a gravitational potential energy of -342 J. How high from the ground is it? Group of answer choices GPE canno
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!