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02.03.2020 •
Physics
A plane electromagnetic wave traveling in the positive direction of an x axis in vacuum has components Ex = Ey = 0 and Ez = (4.3 V/m) cos[(π × 1015 s-1)(t - x/c)].(a) What is the amplitude of the magnetic field component?
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Ответ:
Explanation:
Given data
Ex = Ey = 0
Ez=(4.3V/m)cos(π×10¹⁵s⁻¹)(t-x/c)
To find
The amplitude of the magnetic field component
Solution
The electric field is given by:
Ez=(4.3V/m)cos(π×10¹⁵s⁻¹)(t-x/c)
Where Em=4.3 V/m
The magnitude of magnetic field is given by:
Where Em is amplitude of electric field and c is speed of light.
Substitute the given values
So
Ответ:
El resultado es indeterminado porque el volumen máximo que puede contener la superficie de 1500 mm² = 6,3078 × 10⁻⁶ m³ = 0,0063078 litros
Explanation:
El contenido del cilindro son;
Volumen de alcohol = 1 litro = 0,001 m³, densidad = 789 kg / m³
Volumen de gasolina = 2 litros = 0,002 m³, densidad = 680 kg / m³
Volumen de aceite = 1 litro = 0,001 m³, densidad = 700 kg / m³
Volumen de agua = 6 litros = 0,006 m³, densidad = 1000 kg / m³
Volumen de glicerina = 3 litros = 0,003 m³, densidad = 1261 kg / m³
Volumen de plomo = 5 litros = 0,005 m³, densidad = 11,3 g / cm³ = 11,3 kg / m³
Volumen de aluminio = 2 litros = 0,002 m³, densidad = 2,7 g / cm³ = 2,7 kg / m³
Volumen de mercurio = 2 litros = 0,002 m³, densidad = 13600 kg / m³
Por lo tanto, la masa total del contenido del cilindro se da como sigue;
0,001 m³ × 789 kg / m³ + 0,002 m³ × 680 kg / m³ + 0,001 m³ × 700 kg / m³ + 0,006 m³ × 1000 kg / m³ + 0,003 m³ × 1261 kg / m³ + 0,005 m³ × 11,3 kg / m³ + 0,002 m³ × 2,7 kg / m³ + 0,002 m³ × 13600 kg / m³ = 39,8487 kg
39.8939 kilogramos
El volumen total = 1 + 2 + 1 + 6 + 3 + 5 + 2 + 2 = 22 litros = 0.022 m³
Se nos da que el área de superficie = 1500 mm² = 0.0015 m²
∴ π · r² + 2 · π · r · h = 0,0015 m²
π · r² · h = 0,022 m³
h = 0.022 / (π · r²)
Usando los valores, tenemos
Volumen = π · r² · (0,0015 - π · r²) / (2 · π · r)
Desde una aplicación en línea, el volumen máximo que puede contener una superficie determinada = 0,0063078 litros.