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
Nana76 [90]
2 years ago
12

electromagnetic waves of wavelengths 1,34nm are emitted. how much energy do photons of this light have​

Physics
1 answer:
Sergio039 [100]2 years ago
8 0

Answer:

energy =  \frac{planck  \: const.\:  \times speed \: of \: light}{wavelength}

You might be interested in
Two wheels with fixed hubs and radii 0.51 m and 1.9 m, each having a mass of 3 kg, start from rest. Forces 5 N and F2 are applie
Katarina [22]

Answer:

18.63 N

Explanation:

Assuming that the sum of torques are equal

Στ = Iα

First wheel

Στ = 5 * 0.51 = 3 * (0.51)² * α

On making α subject of formula, we have

α = 2.55 / 0.7803

α = 3.27

If we make the α of each one equal to each other so that

5 / (3 * 0.51) = F2 / (3 * 1.9)

solve for F2 by making F2 the subject of the formula, we have

F2 = (3 * 1.9 * 5) / (3 * 0.51)

F2 = 28.5 / 1.53

F2 = 18.63 N

Therefore, the force F2 has to 18.63 N in order to impart the same angular acceleration to each wheel.

3 0
3 years ago
________ in the ear change sound waves to electrical signals that the brain can interpret as sounds
Assoli18 [71]

Answer:

ear

Explanation:

7 0
3 years ago
How are electromagnetic waves able to travel without a medium?
vazorg [7]
Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. this means that electromagnetic waves can travel not only trough air and solid materials, but also trough the vacuum of space.
7 0
3 years ago
In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the sys
nydimaria [60]

Answer : The final energy of the system if the initial energy was 2000 J is, 3500 J

Solution :

(1) The equation used is,

\Delta U=q+w\\\\U_{final}-U_{initial}=q+w

where,

U_{final} = final internal energy

U_{initial} = initial internal energy

q = heat energy

w = work done

(2) The known variables are, q, w and U_{initial}

initial internal energy = U_{initial} = 2000 J

heat energy = q = 1000 J

work done = w = 500 J

(3) Now plug the numbers into the equation, we get

U_{final}-(2000J)=(1000J)+(500J)

(4) By solving the terms, we get

U_{final}-(2000J)=(1000J)+(500J)

U_{final}-(2000J)=1500J

U_{final}=2000J+1500J

U_{final}=3500J

(5) Therefore, the final energy of the system if the initial energy was 2000 J is, 3500 J

5 0
3 years ago
What is 18 m/s north an example of?
Mkey [24]

Answer:

It is an example of velocity

Explanation:

It is an example of velocity Don't ask how I know because I do know it I just don't know how to explain it.

8 0
3 years ago
Other questions:
  • two cars are moving at constant speeds in a straight line along a major highway. The first is travelling at 20ms^-1 and the seco
    14·1 answer
  • The nuclear fuel distribution in a nuclear reactor is chosen so that when in operation the wall temperature of the reactor is a
    8·1 answer
  • An atom of an element with two valence electrons reacts with two atoms of an element with atomic number 17 to form an ionic comp
    11·1 answer
  • Desert climates can have very hot days and very cold nights. This is because _____.
    5·2 answers
  • ANSWER ASAP!!!If a wave machine produces 10 waves in 2 seconds, what is the frequency of the machine in Hertz?
    9·1 answer
  • The unit of potential is the?
    14·1 answer
  • You are hiking in Yellowstone National Park. A park ranger is speaking to students visiting a hot spring. Temperatures there can
    9·1 answer
  • Why is area called scalar quantity​
    15·1 answer
  • Which FBD would represent a car moving right with a motor force of 250 N, and force of friction of 750N, a weight of 8500N and a
    5·1 answer
  • Each vertical line on the graph is 1 millisecond (0.001 s) of time. What is the period and
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!