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
Nataly_w [17]
3 years ago
7

If the stopping potential of a metal when illuminated with a radiation of wavelength 480 nm is 1.2 V, find (a) the work function

of the metal, (b) the cutoff wavelength of the metal, and (c) the maximum energy of the ejected electrons
Physics
1 answer:
Sindrei [870]3 years ago
6 0

Answer:

a) \phi=2.22\times10^{-19}\, J

b) \lambda_0=900 \, nm

c) K_{max}=e\cdot V_0=1.922\times 10^{-19}\, J

Explanation:

a)  

We have that for the photoelectric effect the maximum kinetic energy for the electrons is given by:

K_{max}=\frac{hc}{\lambda}-\phi=e\cdot V_0

From the previous we get:

\phi=\frac{hc}{\lambda}-e\cdotV_0\=2.22\times10^{-19} \, J

Where we used the fact that h=6.63\times 10^{-34} \, J.s,e=1.602\times 10^{-19} \, C and c=3\times 10^{8}\, m/s.

b)

The work function is defined as:

\phi=\frac{hc}{\lambda_{0}}\implies\lambda_0=\frac{hc}{\phi}=9.0\times10^{-7}=900 \, nm

Where \lambda_0 is the cutoff wavelength.

c)

As said before:

K_{max}=e\cdotV_0=1.602\times 10^{-19}=1.922\times 10^{-19} J

You might be interested in
What is a element that tends to be shiny, easy shaped, and a good conductor of heat?
ozzi
The answer to your question is Metal
8 0
3 years ago
How does temperature,barometric pressure,humidity,wind speed and direction, and precipitation determine the weather in a particu
Deffense [45]
Temperature is how hot or cold something is,barometric is air pressure(when the pressures high,the weather is dry)humidity is how moist the air is and how many water particles are there, wind speed and direction is how the hot and cold air is moving and how fast,which makes wind (high to low, hot to cold) precipitation is how much it is raining at that point.
7 0
3 years ago
The surface of the Earth changes from processe such as erosion. Which of these changes to Earth's surface is an example of erosi
Ad libitum [116K]

Answer:

D. the wind picking up dust and carrying it

Explanation:

Erosion is a process in which an agent transfer the top soil to another region, thereby exposing the lower soil. These agents have the ability to move the top layer of soil and deposit it at another place. The major agents in this case are; a running or flowing body of water and wind.

Therefore, the change to the Earth's surface that is an example of erosion is the wind picking up dust and carrying it. Thereby exposing the lower layers.

6 0
2 years ago
The passenger-side rear view mirror on a car says, “Objects in the mirror may be closer than they appear”. Assuming the images a
Ipatiy [6.2K]

Answer:

the mirror is a convex mirror

4 0
3 years ago
A potential difference of 24 V is applied to a 150-ohm resistor. How much current flows through the resistor?​
Lady_Fox [76]

Given :- A resistor of 150 ohm, hence Resistance (R) = 150 ohm

Potential Difference (v) = 24 V

Current (I) = ?

V = IR

24 = I × 150

I = 24/150

I = 0.16 ampere

hope it helps!

3 0
3 years ago
Other questions:
  • Lottery balls are thrown into a hopper and are set into motion by air forced through the container. each ball has a mass of 0.00
    15·1 answer
  • during the spin dry cycle of a washing machine, the motor slows from 90 rad/s to 30 rad/s while turning the drum though an angle
    10·1 answer
  • 2. SHOCKING BLANCHED VEGETABLES MAKES THEM, WHAT?
    12·1 answer
  • John is traveling north at 20 meters/second and his friend Betty is traveling south at 20 meters/second. If north is the positiv
    8·2 answers
  • All of the following are possible sources of error in a scientific investigation except for
    7·2 answers
  • A 90dB sound wave strikes an eardrum whose area is 5.0×10^-5m^2. How much energy is absorbed by the eardrum per second
    6·1 answer
  • How does a nuclear power plant produce energy
    13·1 answer
  • Hydrogen peroxide is sold commercially as an aqueous solution in brown bottles to protect it from light. Calculate the longest w
    6·2 answers
  • What does a resistor in an electrical dp
    12·1 answer
  • A block of cheese is pulled on by a string and slides to the right along a rough surface.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!