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
Gennadij [26K]
2 years ago
8

State four law of photoelectric effect​

Physics
2 answers:
Bogdan [553]2 years ago
7 0

Answer:

LAW 1 :  For a given metal and frequency, the number of photoelectrons emitted is directly proportional to the intensity of the incident radiation.  

---------------------------------------------

LAW 2: For a given metal, there exists a certain frequency below which the photoelectric emission does not take place. This frequency is called threshold frequency.

-----------------------------------------------

LAW 3: For a frequency greater than the threshold frequency, the kinetic energy of photoelectrons is dependent upon frequency or wavelength but not on the intensity of light.

-----------------------------------------------

LAW 4: Photoelectric emission is an instantaneous process. The time lag between incidence of radiations and emission of electron is 10^-9 seconds.

Explanation:

Illusion [34]2 years ago
3 0

Answer:

LAW 1 : For a given metal and frequency, the number of photoelectrons emitted is directly proportional to the intensity of the incident radiation. ... LAW 4: Photoelectric emission is an instantaneous process.

You might be interested in
Help me plzzz?? I need help it on the picture
madam [21]

No. 
The acceleration of gravity on or near Earth's surface is 9.8 m/s² ,
not 20 m/s² .

If it were 20 m/s², then you would weigh almost exactly double
what you really weigh now.
 
3 0
3 years ago
Which statements are true? Science is a collection of facts that does not evolve. We have gained all the knowledge we can from s
puteri [66]

Answer: Scientists observe natural events occuring around them. If a hypothesis is not veriffied by the results from the scientific method, scientists may redo the process or create a new hypothesis

Explanation:

4 0
3 years ago
A skateboarder drops in off the top of one side of the half pipe shown below. She does not push off and starts from rest. She st
solong [7]

Answer:

v

Explanation:

4 0
2 years ago
A space vehicle approaches a space station in orbit. The intent of the engineers is to have the vehicle slowly approach, reducin
N76 [4]

Answer: The total momentum before the docking maneuver is mV_{1}+MV_{2} and after the docking maneuver is (m+M) U

Explanation:

Linear momentum p (generally just called momentum) is defined as mass in motion and is given by the following equation:  

p=m.v  

Where m is the mass of the object and v its velocity.

According to the conservation of momentum law:

<em>"If two objects or bodies are in a closed system and both collide, the total momentum of these two objects before the collision </em>p_{i} <em>will be the same as the total momentum of these same two objects after the collision </em>p_{f}<em>". </em>

<em />

p_{i}=p_{f}

This means, that although the momentum of each object may change after the collision, the total momentum of the system does not change.

Now, the docking of a space vehicle with the space station is an inelastic collision, which means both objects remain together after the collision.

Hence, the<u> initial momentum</u> is:

p_{i}=mV_{1}+MV_{2}

Where:

m is the mass of the vehicle

V_{1} is the velocity of th vehicle

M is the mass of the space station

V_{2} is the velocity of the space station

And the <u>final momentum</u> is:

p_{f}=(m+M)U

Where:

U is the velocity of the vehicle and space station docked

6 0
3 years ago
Read 2 more answers
Imagine that you have a 6.50 l gas tank and a 4.50 l gas tank. you need to fill one tank with oxygen and the other with acetylen
Margarita [4]
V₁(O2) = 6.50<span>  L                
</span>p₁(O2) = 155 atm          
V₂(acetylene) = <span>4.50 L                   
</span>p₂(acetylene) =?                             

According to Boyle–Mariotte law (At constant temperature and unchanged amount of gas, the product of pressure and volume is constant) we can compare two gases that have ideal behavior and the law can be usefully expressed as:

V₁/p₁ = V₂/p₂

6.5/155 = 4.5/p₂

0.042 x p₂ = 4.5

p₂ = 107.3 atm



7 0
3 years ago
Other questions:
  • Why do toasters always have a setting that burns the toast to a horrible crisp, which no decent human being would eat?
    13·2 answers
  • If you were trying to build a soundproof room, which of the following materials would you choose in order to absorb the most sou
    6·2 answers
  • Why do we use the two-body problem to solve interplanetary trajectories, instead of including all of the appropriate gravitation
    15·1 answer
  • Macro shots of flowers will typically have a shallow depth of field. True or False?
    14·2 answers
  • Carts A and B have equal masses and travel equal distances D on side-by-side straight frictionless tracks while a constant force
    6·1 answer
  • How does the constitution protect the rights of individuals against vivo
    11·1 answer
  • An object weighs 250N and has a mass of 75 kg. what is the gravity on this planet?
    10·1 answer
  • A circular loop of radius 13 cm carries a current of 13 A. A flat coil of radius 0.94 cm, having 58 turns and a current of 1.9 A
    5·1 answer
  • Use Data to show the iml
    14·2 answers
  • Question is in the picture below
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!