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
klasskru [66]
3 years ago
11

the frequency of a beam of uv light is 1.0 ×10 ^15hz what is the energy in one quantum of this light express it in ev? ​

Physics
1 answer:
kap26 [50]3 years ago
7 0

Answer:

4.14 eV

Explanation:

f = 1.0 ×10^15 Hz

h= 6.63×10^-34 J s (  this is called PLANCK 'S CONSTANT)

ENEGY = E = ?

E = hf  ( THIS IS FORMULA FOR ENERGY OF ONE QUANTA OR ONE PHOTON )

E= 6.63×10^-34×1.0 ×10^15

E = 6.63×10^-19 J

As 1eV = 1.6×10^-19 J so changing energy in eV from joules we will divide energy by 1.6×10^-19

hence E in eV = 6.63×10^-19/(1.6×10^-19)

          E = 4.14 eV

You might be interested in
Explain how the sun's position in the sky affects the length of shadows
Serggg [28]

A shadow forms on the side of an object that faces away from the sun. The length of shadows changes as Earth rotates. In the morning, the sun is low in the eastern sky and shadows are long. As time passes in the morning, the sun seems to move higher in the sky.

8 0
3 years ago
A skier starts from rest at the top of a hill that is inclined 10.5° with respect to the horizontal. The hillside is 200 m long,
Svetlanka [38]

Answer:

d) 289.31 m

Explanation:

Energy provided by potential energy = mgh = m x 9.8x 200 sin10.5 = 357.18m

Energy used by friction = μmgcos 10.5 x 200 = .075 x m x 9.8 x cos 10.5 x200 = 144.54 m .

Energy used by friction on plain surface = μmg x d.( dis distance covered on plain ) =.075x m x 9.8 xd = .735 m d

To equate

357.18 m -144.54 m = .735 m d

d = 289.31 m .

4 0
3 years ago
A skateboarder, starting from rest, rolls down a 10.9-m ramp. When she arrives at the bottom of the ramp her speed is 6.74 m/s.
JulijaS [17]

Answer:b

Explanation:b

4 0
3 years ago
What kind of frequency do radio waves have?<br><br>A. High frequency <br><br>B. Low frequency ​
inn [45]
B low frequency it is the lowest frequency
7 0
3 years ago
Batteries involve the flow of electricity from one metal to another. What happens to these metals to cause the batteries to, eve
Nataly [62]
The metals will start to rust lol. i think. because this messes up how the metals conduct the flow of the electricity.
3 0
3 years ago
Other questions:
  • Isla made ice by putting water in the freezer. Freezing is an example of (2 points)
    10·2 answers
  • A diver can reduce her moment of inertia by a factor of about 3.5 when changing from the straight position to the tuck position.
    12·1 answer
  • Radiation transfers energy by moving matter. Please select the best answer from the choices provided T F
    13·1 answer
  • PLEASE HELP!
    15·2 answers
  • A ball at the end of a string of 2.2m length rotates at
    9·2 answers
  • During bicycling, a 70 kg person's body produces energy at a rate of about 500 W due to metabolism, 80% of which is converted to
    14·1 answer
  • Gayle cooks in her micwave
    11·1 answer
  • A bucket of warm water can be considered a closed system for a very short period of time. Which best explains this phenomenon? A
    9·1 answer
  • Three pucks A, B, and C are shown sliding across ice at the noted speeds. Air and ice friction forces
    7·1 answer
  • What is a moving inclined plane??
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!