Answer:
<em>El automovilista recorrió 92.315 metros</em>
Explanation:
<u>Movimiento Uniformemente Acelerado</u>
Ocurre cuando la rapidez de un móvil cambia en cantidades iguales en tiempos iguales. El cambio de velocidad por unidad de tiempo es llamado aceleración.
Siendo vo la rapidez inicial del móvil, vf su velocidad final, y t el tiempo que tarda en variar la velocidad, la aceleración se calcula con la fórmula:
Por su parte, el móvil en su trayectoria recorre una distancia x dada por:
Datos: El automovilista lleva inicialmente una rapidez vo=30.5 m/s y la disminuye uniformemente con una aceleración (de frenado) de hasta reducir a vf=19.4 m/s.
Despejando el tiempo de la ecuación [1] y substituyéndolo en la [2], obtenemos la relación:
De donde podemos calcular x:
Reemplazando valores:
x = 92.315 m
El automovilista recorrió 92.315 metros
Answer:
increases the voltage output
Explanation:
By Increasing the number of turns on the generator coil , the output volatge of a generator increases. However, there are various other methods availbble to increase the output voltage of a generator. Some of these can be
1. By increasing the rpm of generator coil.
2. By using stronger magnets
Speed and direction are the two scientific componets that make up velocity.
The electric flux is - 4.80 × 10∧5 N m2 C-1
How to calculate the electric flux
Use the formula:
Electric flux, ΦE = EScosθ
Where,
E = electric flux
S = area of the rectangular surface = length × breadth = 6.00 × 3.00 = 18.00 m²
E = magnitude = 2. 70 × 10∧4 N/C
θ = the angle between the electric field lines = 15. 7°
Substitute the values into the equation
EФ = 2. 70 × 10∧4 × 18. 00 × Cos (15.7)
EФ = 2. 70 × 10∧4 × 18. 00 × -0.9999
EФ= - 4.79 × 10∧5 N m2 C-1
Therefore, the electric flux is - 4.80 × 10∧5 N m2 C-1
Learn more about electric flux here:
brainly.com/question/14529872
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Answer:
= 1.47 eV
Explanation:
This is an exercise that we can solve using the photoelectric effect, which stable that photons can be treated as particles and collide with the material, the process is described by the expression
+ Φ = h f
Where Kmanx is the maximum energy of the torn electrons, Φ is the work function of the material and hf is the energy of the photons
With the initial data we calculate the job function
We use the relationship of wave velocity with wavelength and frequency
c = λ f
f = c / λ
f = 3 10⁸/400 10⁻⁹
f = 7.5 10¹⁴ Hz
Let's reduce the magnitude to the SI system
= 1.10 eV (1.6 10⁻¹⁹ J / 1 ev = 0.6875 10⁻¹⁹ J
Φ = h f -
Φ = 6.63 10⁻³⁴ 7.5 10¹⁴ - 0.6875 10⁻¹⁹
Φ = 4.9725 10⁻¹⁹ - 0.6875 10⁻¹⁹
Φ = 4.275 10⁻¹⁹ J
Now let's calculate the frequency of the other wavelength
f = c / λ₂
f = 3 10⁸/300 10⁻⁹
f = 1 10¹⁵ Hz
We calculate
= hf - Φ
= 6.63 10⁻³⁴ 1 10¹⁵ - 4.275 10⁻¹⁹
= 6.63 10⁻¹⁹ - 4,275 10⁻¹⁹
= 2,355 10⁻¹⁹ J
= 2,355 10⁻¹⁹ j (1 eV / 1.6 10⁻¹⁹ j)
= 1.47 eV