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dem82 [27]
3 years ago
7

For a futuristic spacecraft, a solar sail was used as a means of propulsion. Assume the spacecraft had a mass of 360 kg, the sai

l area (perpendicular to the Sun) was 1 million square meters, and the spacecraft was 0.5 AU (astronomical units) from the Sun. Remember than 1 AU is the Earth to Sun distance. Assume the reflectivity of the sail was 1.0. What is the acceleration (in m/s2) of the spacecraft away from the Sun?
Physics
1 answer:
IRISSAK [1]3 years ago
7 0

Answer:

a = 5.037 10⁻²  m / s²

Explanation:

For this exercise we will use the concept of radiation pressure for a reflective surface

           P = S / c

Where c is the speed of light and S is the pointing vector which is equal to the intensity of the radiation

The definition of Pressure is

          P = F / A

          F = P A

Newton's second law gives the relationship between force and acceleration

            F = m a

We substitute

           P A = m a

           a = I  A / c  m

Let's look for the radiation intensity, for this we use that the intensity in the Earth's orbit is 1360 W / m².

We must look for the intensity in the orbit would want 0.5 AU, for this we use the definition of instance

           I = P / A

             

Where P is the power of the sun's emission that is constant

         P = I A

         I₁ A₁ = I₂ A₂

Where index 1 is for Earth and 2 for the orbit at 05 AU

he area of ​​a sphere is

          A = 4 π R²

           I₂ = I₁ A₁ / A₂

           I₂ = I₁ R₁² / R₂²

           I₂ = 1360 (150 10⁶/75 10⁶)²

           I₂ = 5440 W

This is the radiation at the point of interest

Let's calculate

           a = 5440/3 10⁸   10⁶/360

           a = 5.037 10⁻²  m / s²

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Explanation:

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Pa help po science po yan pang grade 7
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Answer:

table 1:

1. 100/15 = 6.7 m/s

2. 100/12 = 8.3 m/s

3. 100/9 = 11.1 m/s

table 2:

1. 100/8 = 12.5 m/s

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Explanation:

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A cubical surface surrounds a point charge q . Describe what happens to the total flux through the surface if (c) the surface is
valentina_108 [34]

Answer:

Gauss law states that the electric flux is defined as the electric field multiplied by the area of the surface in a plane perpendicular to the field.

Explanation:

Mathematically,

Φ=Q ϵo

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ϵo is the permittivity of the free space

According to Gauss law, which states that the electric flux is defined as the electric field multiplied by the area of the surface in a plane perpendicular to the field.

Φ=Q ϵo

Where;

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ϵo is the permittivity of the free space

If the cube is transformed into a sphere the total flux in the electric field remains unchanged or remains the same. This is because the gaussian law does not postulate that electric flux is dependent on the object in a plane. Hence, the transformation of the cube to a sphere does not affect the electric flux generated in the field.

To learn more about how the total flux through a sphere relates to the surface change, click brainly.com/question/4362789

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