Answer:
B blue
Explanation:
This is an exercise of photoelectric effect where electrons are removed from the metal by the incident radiation, the explanation of this phenomenon was given by Einstein, they assume that the light is formed by quanta and these collide with the electrons promoting their transfer; The equation that describes the process is
= h f - Φ
Where
is the kinetic energy, maximize the electrons started, h the plan constant, f the frequency and Φ the work function of the metal (link energy)
The radiation with the lowest energy that an electron can start
h f = Φ
Let's analyze the energy of the light rays with the wavelength
c = λ f
f = c / λ
λ red = 700 10⁻⁹ m
f = 3 108/700 10⁻⁹
f₁ = 4.29 10¹⁴ Hz
Yellow λ = 600 10⁻⁹ m
f₂ = 3 108/600 10⁻⁹
f₂ = 5 10¹⁴ Hz
λ blue = 450 10⁻⁹ m
f₃ = 6.67 10¹⁴ Hz
In the initial metal with a work function fi1 yellow light was needed, to start the electrons, when analyzing the initial equation if the work function increases Φ₂> Φ₁ more energy is needed to take out the electrons from the atom (E₂>E₁)
light of greater energy (frequency) than yellow is needed so that light is needed to go BLUE
Answer:
Volumetric flow rate = 0.024 m³/s
Explanation:
Volumetric flow rate = Discharge = Q
We have expression for discharge, Q = Area ( A) x Velocity (v)
Velocity , v = 3 m/s
![\texttt{Area, A}=\frac{\pi d^2}{4}=\frac{\pi \times (10\times 10^{-2})^2}{4}=7.85\times 10^{-3}m^2](https://tex.z-dn.net/?f=%5Ctexttt%7BArea%2C%20A%7D%3D%5Cfrac%7B%5Cpi%20d%5E2%7D%7B4%7D%3D%5Cfrac%7B%5Cpi%20%5Ctimes%20%2810%5Ctimes%2010%5E%7B-2%7D%29%5E2%7D%7B4%7D%3D7.85%5Ctimes%2010%5E%7B-3%7Dm%5E2)
Substituting
Discharge, Q =Av = 7.85 x 10⁻³ x 3 = 0.024 m³/s
Volumetric flow rate = 0.024 m³/s
acceleration times the time falling
in this case it would be =(9.81 m*s^-1)(2)
=19.62 m*s^-1
Answer:
The positive sign indicates that work is done by the gas.
Explanation:
Let consider that gas inside the cylinder behaves ideally and process is isothermal, so that change in internal energy can be neglected. The engine cylinder is modelled after the First Law of Thermodynamics:
![W + P\cdot(V_{in}-V_{out}) = 0](https://tex.z-dn.net/?f=W%20%2B%20P%5Ccdot%28V_%7Bin%7D-V_%7Bout%7D%29%20%3D%200)
![W = P\cdot (V_{out}-V_{in})](https://tex.z-dn.net/?f=W%20%3D%20P%5Ccdot%20%28V_%7Bout%7D-V_%7Bin%7D%29)
![W = P\cdot A\cdot \Delta x](https://tex.z-dn.net/?f=W%20%3D%20P%5Ccdot%20A%5Ccdot%20%5CDelta%20x)
![W = (7.5\times 10^{5}\,Pa)\cdot (0.01\,m^{2})\cdot (0.04\,m)](https://tex.z-dn.net/?f=W%20%3D%20%287.5%5Ctimes%2010%5E%7B5%7D%5C%2CPa%29%5Ccdot%20%280.01%5C%2Cm%5E%7B2%7D%29%5Ccdot%20%280.04%5C%2Cm%29)
![W = 300\,kPa](https://tex.z-dn.net/?f=W%20%3D%20300%5C%2CkPa)
The positive sign indicates that work is done by the gas.
Answer:
3 bands
Explanation:
Basically, the Parametric EQ divides the audio spectrum into three bands, allowing you to enhance (or suppress) the level in that range.