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3 years ago

how did the occurrence of the supernova help support galileo's view that earth was not the center of the universe

1 answer:

3 0

The supernova of 1604 was observed in Padua on 10 October 1604 but on account of cloudy weather Galileo did not see it until a few days later. The supernova created great excitement and Galileo, who taught mathematics and astronomy at the University, was asked to give three public lectures that were attended by a large audience. In this paper we show how Galileo explained the nature of parallax in order to demonstrate that the new star was well beyond the Moon. We also consider his attempt to determine the nature of the star, and the amusing pamphlet that he penned to lampoon professional philosophers who denied that new stars could appear in the heaven
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back at it again with the answer
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Zane

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Classify the following as either an element, compound, homogeneous mixture or

masya89 [10]

Answer:

<h2>Heterogeneous</h2>

Explanation:

<h3>Milk seems to be homogeneous mixture but actually milk is a heterogeneous mixture and a colloid solution.</h3>

8 0

2 years ago

In a study of the conversion of methane to other fuels, a chemical engineer mixes gaseous methane and gaseous water in a 0.778 L

sergejj [24]

Answer:

the water concentration at equilibrium is

⇒ [ H2O(g) ] = 0.0510 mol/L

Explanation:

CH4(g) + H2O(g) ↔ CO(g) + 3H2(g)

∴ Kc = ( [ CO(g) ] * [ H2 ]³ ) / ( [ CH4(g) ] * [ H2O(g) ] ) = 0,30

equilibrium:

⇒ [ CO(g) ] = 0.206 mol / 0.778 L = 0.2648 mol/L

⇒ [ H2(g) ] = 0.187 mol / 0.778 L = 0.2404 mol/L

⇒ [ CH4(g) ] = 0.187 mol / 0.778 L = 0.2404 mol/L

replacing in Kc:

⇒ ((0.2648) * (0.2404)³) / ([ H2O(g) ] * 0.2404 ) = 0.30

⇒ 0.0721 [ H2O(g) ] = 3.679 E-3

⇒ [ H2O(g) ] = 0.0510 mol/L

7 0

2 years ago

A fog over a lake. what two changes of state must occur to produce the fog? do the water molecules absorb or release energy duri

Zolol [24]

The water from the lake must first evaporate from the liquid state to the gaseous state and then condense in the air to form vapors.
The water molecules absorb energy while evaporating and release it when condensing. Their motion gets faster when they are evaporating and slows back down upon condensation.

3 0

2 years ago

Read 2 more answers

Which two celestial bodies orbit the Sun?

tiny-mole [99]

Number 1 is Comets and asteroids
Number 2 is Comets are made of ice and rock
Number 3 is Meteor

7 0

2 years ago

Read 2 more answers

En que se fundamento Moseley para describir la tabla periódica actual?

Burka [1]

Answer:

La tabla periódica de moseley fue una manera de dar solución a esta problemática, ya que nos permite tener a la mano todos los elementos que se han descubierto hasta la actualidad y sus propiedades químicas más resaltantes.

A continuación se Describe una linea del tiempo de la creación de la tabla periodica:

1820 - se crean las tríadas de Dobereiner.

1863 - se crea el cilindro de chancourtois.

1864 - se crean las octavas de newlands.

1869 - se crea el primer prototipo de la tabla periódica.

1914 - se fórmula la ley periódica moderna por Moseley.

Explanation:

4 0

3 years ago