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
Dennis_Churaev [7]
3 years ago
13

What is the work function of cadmium metal if light with = 9.85×1014hz is necessary to eject electrons?

Physics
1 answer:
Alika [10]3 years ago
3 0

We use the Planck’s formula:

E = hv

where,

E = energy, h = planck’s constant = 6.6x10^-34 J s, v = frequency in Hz (Hz = 1 / s)

 

Subsituting the values to find for E:

E = (6.6×10^-34 J s) * 9.85×10^14 / s

E = 6.5x10^-19 J

You might be interested in
Two bicycle tires are set rolling with the same initial speed of 4.00 m/s along a long, straight road, and the distance each tra
77julia77 [94]

Answer:

The coefficient of rolling friction for the tire under low pressure is 0.0342.

Explanation:

Two bicycle tires are set rolling with the same initial speed of 4.00 m/s

Final speed of both the bicycle, speed is reduced by half is measured, v = 2 m/s.

Here,

u_kmg = ma\\\\a=\mu g

Using third equation of motion as :

v^2-u^2=2as\\\\v^2-u^2=2\mu gs\\\\\mu =\dfrac{v^2-u^2}{2gs}\\\\\mu =\dfrac{4^2-2^2}{2\times 9.8\times 17.9}\\\\\mu=0.0342

So, the coefficient of rolling friction for the tire under low pressure is 0.0342.

5 0
3 years ago
Two advantages of solar energy over energy from Fossil fuels​
Law Incorporation [45]

Answer:

1)Fuel Sourcing

2)Power Generation

Explanation:

1)Fuel Sourcing : Fossil fuels must be located, excavated and transported before they can be used. These processes are invasive and detrimental to the land through side effects such as erosion as well as ecological and geologic instability. Then the deposit or well is depleted. Energy from the sun is infinite and free. It can be harnessed and turned into power anywhere a solar panel can be mounted.

2)Power Generation: Fossil fuels must be burned to produce electricity. Burning them creates unwanted byproducts that can create air and water pollution and release huge amounts of greenhouse gasses into the atmosphere.

3 0
3 years ago
Read 2 more answers
The joule is an example of units of work. Which of the following is not a valid unit of work? ft-lb (kg-m2)/s2 inch-ton lb/s2
Dahasolnce [82]

The "<em>lb/s² </em>" is not a valid unit of work.

Each of the others is (a unit of force) x (a unit of distance) which is pretty much the definition of work.

5 0
4 years ago
According to which calendar is new year’s celebrated on january 1st?
Sholpan [36]

Answer:

Gregorian calendar

Explanation:

Some types of calendar available are

  • Gregorian calendar
  • Julian calendar
  • Islamic calendar
  • Solar Hijri calendar
  • Hebrew calendar

Gregorian calendar: January 1st is new year and it the most widely used calendar in the world.

Julian calendar: January 14th is new year.

Islamic calendar: it follow the phase of the moon and those not regard seasons.

Solar hijri calendar: 21st of March is new year.

Hebrew calendar: 18th September will be the new year for 2020 in the Hebrew calendar.

5 0
3 years ago
angela uses a force of 25 newtons to lift her grocery bag while doing 50 joules of work. how far did she lift the grocery bags
Evgen [1.6K]
We know that:
W=Fs
50J=25N*s
s=50J/25N
s=2m
5 0
3 years ago
Other questions:
  • Which best describes what is made of matter?
    13·2 answers
  • A concave lens can only form a
    11·1 answer
  • What is the maximum possible resultant of two vectors with magnitudes of 2 and 4 units? what is the minimum possible resultant?
    7·1 answer
  • A galloping pony speeds past you at 5 m/s. The frequency of the sound produced by the hooves on the dirt is 221 Hz. Assume the s
    10·2 answers
  • Does a stove have mechanical energy
    15·1 answer
  • (An easy problem which will be graded). Later in the quarter we will spend some time solving the diffusion equation Op(r, t) = D
    13·1 answer
  • an object moving with a speed of 5 m/s has a kinetic energy of 100 J. what is the mass of the object?
    6·1 answer
  • What happens to the force between two magnets as the magnets come closer together? *
    13·2 answers
  • How is pressure and density related?
    5·1 answer
  • 2. A mixing bowl has a mass of 0.5kg. A baker adds 0.0002m of water to the mixing bowl until
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!