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Mumz [18]
3 years ago
10

What is the rms current flowing through a light bulb that uses an average power of 30.0 W when it is plugged into a wall recepta

cle supplying an rms voltage of 240.0 V
Physics
1 answer:
Amiraneli [1.4K]3 years ago
7 0

Answer:

0.125 A

Explanation:

From the question given above, the following data were obtained:

Power (P) = 30 W

rms voltage (Vrms) = 240 V

rms Current (Irms) =?

The power in an electric circuit is given by the following equation:

Power (P) = current (I) × voltage (V)

With the above formula, we can obtain the rms current flowing through the bulb as shown below:

Power (P) = 30 W

rms voltage (Vrms) = 240 V

rms Current (Irms) =?

P = Irms × Vrms

30 = Irms × 240

Divide both side by 240

Irms = 30 / 240

Irms = 0.125 A

Thus, the rms current flowing through the light bulb is 0.125 A

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Little Joey jumps into a pool on a cool fall morning. How can we describe the direction of energy transfer and temperature chang
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Hello!

Energy always flows from hot to cold so the best answer would be A. Even though it will be a small change due to the difference in masses and the difference in body temp and the pool water on a cool morning.

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3 years ago
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The mass of the whole object is equal to the sum of all its parts A. Law of Conservation of Energy B. Law of Conservation of Mas
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Answer:

B. Law of Conservation of Mass

Explanation:

In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system.

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3 years ago
Queremos diseñar un montacargas que pueda subir con una rapidez de 12 km/h una mas 700 kg hasta 40 m de altura en un minuto. Cal
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Answer:

a) El trabajo realizado es de 274,680 J

b) La potencia de la carretilla elevadora es de 4578 Watts.

c) La energía cinética del montacargas es de 3.888.\overline 8 J

d) La energía potencial del montacargas es de 274.680 Joules.

e) La energía mecánica de la carretilla elevadora 278,568.\overline 8 J

Explanation:

a) Los parámetros dados son;

La velocidad de la carretilla elevadora, v = 12 km / h = 10/3 m / s

La masa que debe levantar la carretilla elevadora, m = 700 kg

La altura a la que se levantará la masa, h = 40 m

El trabajo realizado, W = Fuerza, F × Distancia, h

 La fuerza, F aplicada = El peso de la carga = Masa, m × Gravedad, g

Donde 'g' es la aceleración debida a la gravedad ≈ 9,81 m / s²

∴ Trabajo realizado, W = 700 kg × 9,81 m / s² × 40 m = 274,680 J

b) El tiempo que se tarda en subir 40 m = 1 minuto = 60 segundos

∴ Potencia = Trabajo / tiempo

Por lo tanto, la potencia del montacargas, P = 274,680 J / (60 s) = 4578 Watts

c) Energía cinética, K.E. = 1/2 · m · v²

La energía cinética de la carretilla elevadora, K.E. se da como sigue;

Carretilla elevadora K.E. = 1/2 × 700 kg × (10/3 m / s) ² = 3.888.\overline 8 J

d) La energía potencial del montacargas a 40 m, P.E. = m · g · h

∴ P.E. = 700 kg × 9,81 m / s² × 40 m = 274,680 Julios

e) La energía mecánica, M.E. = P.E. + K.E.

∴ M.E. = 3.888.\overline 8 J + 274,680 J = 278,568.\overline 8 J

La energía mecánica de la carretilla elevadora, M.E.= 278,568.\overline 8 J.

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The ocean currents differed because Pangaea moved.
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When a guitar string is plucked, the guitar string oscillates as a result of waves moving through the string. The vibrations of
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Answer:

Explanation:

Wave produced in string and waves produced in air are different . The only similarity is that their frequency are equal . Otherwise , no similarity . One is transverse ( on wire ) , the other is longitudinal ( air ) . Their velocities too are different .

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if frequency is constant

wavelength  ∝  velocity

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