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
valkas [14]
9 months ago
10

light with a wavelength of 415 nm illuminates a metal cathode. the maximum kinetic energy of the emitted electrons is 0.61 ev .

Physics
1 answer:
Lapatulllka [165]9 months ago
6 0

By photoelectric effect, the remaining energy is 3.82 x 10¯¹⁹ joule.

The photoelectric effect occurs when electrons are emitted from metal when the metal is struck by light of certain frequencies. The electrons produced by the photoelectric effect have maximum kinetic energy proportional to stopping potential energy from the metal which can be determined as:

Kmax = e.Vo

where Kmax is maximum kinetic energy and Vo is stopping potential energy.

From the question above, we know that:

Kmax = 0.61 eV = 9.77 x 10 ¯²⁰ joule

λ = 415 nm = 415 x 10¯⁹ m

Light energy is

E = hc / λ

E = 6.63 × 10¯³⁴ . 3 x 10⁸ / ( 415 x 10¯⁹ )

E = 4.79 x 10¯¹⁹ joule

Hence the remaining energy is

ΔE = E - Kmax

ΔE = 4.79 x 10¯¹⁹ - 9.77 x 10 ¯²⁰

ΔE = 3.82 x 10¯¹⁹ joule

Find more on photoelectric effect at: brainly.com/question/21320305

#SPJ4

You might be interested in
Which two conditions would result in the weakest electric force between objects?
Novay_Z [31]
The objects are far apart the weakest the result the two conditions
3 0
3 years ago
An elephant lifts 7 large logs from the ground to a container 5 meters above the ground as part of a zoo demonstration. The elep
Alisiya [41]
The work done by the elephant to lift one log is the force multiplied by the height at which the log has been lifted:
W=Fh=250 N \cdot 5 m=1250 J
And so, the total work done to lift the 7 logs is 7 times the work done to lift each log:
W_t = 7 W=7 \cdot 1250 N=8750 J
5 0
2 years ago
Which of the following statements is TRUE about updating the exposure control plan?
iren2701 [21]

Statements that are true as regards exposure control plan and its updating are;

<em>Updates must have the  reflection of changes in tasks as well in procedures.</em>

<em>Updates must reflect changes in positions that affect occupational exposure.</em>

<em>Updates must have the cost of PPE that is needed and  necessary to reduce exposure</em>

An exposure control plan can be regarded as  the framework for compliance between the employer and the workers.

  • This framework give room for the employer to creates a written plan that will help in protecting their workers from bloodborne pathogens.

  • This plan gives hope to workers in term of protection when working with their Employer.

  • There are some elements that is associated with  Exposure Control Plan, and theses are;
  1. Health hazards as well as  risk that is attributed to  each product in the worksite.
  2. Statement of purpose.
  3. procedures and practices in a written form
  4. Responsibilities from the Manager, CEO, designated resources and employer.

Therefore, exposure control plan is avenue to protect workers from bloodborne pathogens.

brainly.com/question/1203927?referrer=searchResults

3 0
2 years ago
Topographic maps represent an area's physical features by describing _____.
jasenka [17]
B is the answer.....
5 0
2 years ago
Read 2 more answers
A concave mirror is diverging mirror.true or false​
marissa [1.9K]

Answer:

true

Explanation:

it is concave when it diverging

4 0
3 years ago
Other questions:
  • When you push on an object such as a wrench, a steel pry bar, or even the outer edge of a door, you produce a torque equal to th
    10·1 answer
  • A compressed spring has 16.2j of elastic potential energy when it is compressed 0.30m what is the spring constant of the spring
    9·1 answer
  • Please answer please please <br><br><br>Physics ​
    6·1 answer
  • hot-air balloon is ascending at the rate of 14 m/s and is 84 m above the ground when a package is dropped over the side. (a) How
    8·2 answers
  • Two runners start a race. After 2 seconds, they both have the same velocity. If they both started at the same time, how do their
    10·2 answers
  • Dump Tower is 96 stories tall. A small, 1.2-kg object is dropped over the side of the roof of the tower and accelerates toward t
    11·1 answer
  • What does the narrator mean when he says that energy is “as old as time itsself “
    10·1 answer
  • A 4 m^3 metal block is suspended using a cable in salt water with density 1030 kg/m^3. Tension on the cable is 42600N. What is t
    15·1 answer
  • In the picture shown below A represents a characteristic of only geocentric model, B represents a characteristic common to both
    14·1 answer
  • the reason the moon does not crash into the earth is that the group of answer choices moon has less mass than the earth. moon ha
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!