Answer:
hello your question is incomplete attached below is the complete question
and solution to the question
Explanation:
To write The equation of the motion in Matrix form
i)First we write the net torque equation for left mass
ii)Next we write the net torque equation for right mass
iii) represent the equation of motion in Matrix form
Answer:
nitrogen
The atmosphere contains many gases, most in small amounts, including some pollutants and greenhouse gases. The most abundant gas in the atmosphere is nitrogen, with oxygen second. Argon, an inert gas, is the third most abundant gas in the atmosphere.
Explanation:
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
The sound was repeated because of the phenomenon of echo. The speed of sound in the metal is 800 m/s.
Echo results from the reflection of sound waves. The reason why a sound may be heard twice owes to the phenomenon of reflection which leads to echo.
To determine the speed of sound in the metal;
Length of metal = 1000 m
Time taken between the two sounds = 2.5 s
Using the formula;
V = 2d/t
V = 2(1000)/2.5
V = 800 m/s