Why do you think most models show the scale sizes of the planets but do not show the scale distances between the planets?

Physics

1 answer:

Effectus [21]3 years ago

8 0

Explanation:

If both distance and size are proportional to that in the solar system, the model would be essentially useless.

For example, if the sun were represented by a marble 1 cm in diameter, the planet Neptune would be represented by a grain of sand .3 mm in diameter about 32.3 meters (106 ft) away. The largest planet, Jupiter, would be a larger sand grain, 1 mm in diameter, about 5.6 meters from the sun. Earth would be less than 0.1 mm in diameter, about 1 meter away from the sun.

Such a model would barely fit into a gymnasium (basketball court), and the elements of it would be very difficult to find without a map.

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3 years ago

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Two small identical metal spheres, A and B, on insulated stands, are each given a charge of +2.0 x 10-5 coulomb. The distance be

SpyIntel [72]

Answer:

a) 90 N

Explanation:

Coulomb's law: states that the electric force of attraction or repulsion between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

It is represented mathematically as

F = 1/4πε₀(q₁q₂)/d²......................... Equation 1

Where F = Electrostatic force, q₁ = charge on the first metal sphere, q₂ = charge on the second metal sphere, d = distance between the spheres, 1/4πε₀ = proportionality constant.

Given: q₁ = +2.0×10⁻⁵ C, q₂ = 2.0×10⁻⁵, d = 2.0×10⁻¹ m

Constant : 1/4πε₀ = 9×10⁹Nm²/C²

Substituting these values into equation 1,

F = (9×10⁹×2.0×10⁻⁵×2.0×10⁻⁵)/(2.0×10⁻¹)²

F = (9×4×10⁻¹)/4×10⁻²

F = 90 N

Therefore the electrostatic force is = 90 N

The right option is a) 90 N

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3 years ago

How does a model differ from a theory?

yuradex [85]

Answer:

Explained

Explanation:

A model is practical representation of reality with help of various tools called model. It is more purposeful, appealing and provide greater understanding of the specific phenomenon called modeling.

Theory on the other hand are set of written statement which is more generalized and aimed to explain the phenomenon. Theory is developed through the process of abstraction, experimentation, and deduction.

A model is often is used to describe an application of a theory for a specific case.

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