It is not possible for an object to have no external/internal forces acting on it. To have an acceleration of 0, the forces acting on the object balance out, leading to the object remaining static.
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Answer:
The energy of these two photons would be the same as long as their frequencies are the same (same color, assuming that the two bulbs emit at only one wavelength.)
Explanation:
The energy of a photon is proportional to its frequency . The constant of proportionality is Planck's Constant, . This proportionality is known as the Planck-Einstein Relation.
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The color of a beam of visible light depends on the frequency of the light. Assume that the two bulbs in this question each emits light of only one frequency (rather than a mix of light of different frequencies and colors.) Let and denote the frequency of the light from each bulb.
If the color of the red light from the two bulbs is the same, those two bulbs must emit light at the same frequency: .
Thus, by the Planck-Einstein Relation, the energy of a photon from each bulb would also be the same:
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Note that among these two bulbs, the brighter one appears brighter soley because it emits more photons per unit area in unit time. While the energy of each photon stays the same, the bulb releases more energy by emitting more of these photons.
To solve this problem it is necessary to apply the concepts related to energy as a function of voltage, load and force, and the definition of Force given by Newton in his second law.
By definition we know that force is equal to
F= ma
Where,
m = mass (at this case of an electron)
a = Acceleration
But we also know that the Energy of an electric object is given by two similar definitions.
Where,
F= Force
q = Charge of proton/electron
V = Voltage
d = Distance
Equating and rearrange for F,
The two concepts of force can be related to each other, then
Acceleration would be,
Replacing with our values we have that the acceleration is
Now through the cinematic equations of motion we know that,
Where,
Final velocity
Initial velocity
a = Acceleration
x = Displacement
Re-arrange to find v_f,
Therefore the electron's speed when it is 0.1 cm from the negative plate is
Explanation:
An adiabatic process is defined as a process in which transfer of heat is equal to zero. According to the first law of thermodynamics, any change in the internal energy is actually in the form of work done.
This means that change in internal energy will be as follows.
Change in internal energy = -work one by the gas
Therefore, we can conclude that true statements for an adiabatic process is as follows.
- During an adiabatic process, the internal energy of the system changes.
- During an adiabatic process, there is no heat transfer into or out of the system.