Two motorcycles travel along a straight road heading due north. At t = 0 motorcycle 1 is at x = 50 m and moves with a constant s
1 answer:
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Answer:
a)
b)
Explanation:
The photoelectric effect consists of the emission of electrons (electric current) that occurs when light falls on a metal surface under certain conditions.
If the light is a stream of photons and each of them has energy, this energy is able to pull an electron out of the crystalline lattice of the metal and communicate, in addition, a kinetic energy.
<u>This is what Einstein proposed: </u>
Light behaves like a stream of particles called photons with an energy :
(1)
So, the energy of the incident photon must be equal to the sum of the Work function
of the metal and the kinetic energy
of the photoelectron:
(2)
Where is the minimum amount of energy required to induce the photoemission of electrons from the surface of Titanium metal.
Knowing this, let's begin with the answers:
<h3 /><h3>a) Maximum possible kinetic energy of the emitted electrons (From (1) we can know the energy of one photon of 233 nm light:
Where:
is the Planck constant
is the wavelength
is the speed of light
(3)
(4) This is the energy of one 233 nm photon
Substituting (4) in (2):
(5)
Finding :
(5) This is the maximum possible kinetic energy of the emitted electrons
Since one photon of 233 nm is able to free at most one electron from the Titanium metal, we can calculate the following relation:
Where is the energy of the burst of light
Hence:
This is the maximum number of electrons that can be freed by the burst of light.
Answer:
F = - 50 N
Hence, the magnitude of resultant force is 50 N and its direction is leftwards.
Explanation:
The magnitude of the resultant force is always equal to the sum of all forces. While, the direction of resultant force will be equal to the direction of the force with greater magnitude:
considering right direction to be positive:
F₁ = Force applied on right rope = 150 N
F₂ = Force applied on left rope = 200 N
Therefore, the resultant force can be found by using these values in equation:
<u>F = - 50 N</u>
<u>Hence, the magnitude of resultant force is 50 N and its direction is leftwards.</u>