4 years ago

What did Edwin Hubble discover about galaxies that allowed him to determine the expansion rate of the universe?

Physics

1 answer:

mario62 [17]4 years ago

6 0

<span> The farther away a galaxy is, the more its light
is shifted toward the red end of the spectrum. (C)</span>

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gavmur [86]

Answer:

Both

Explanation:

The lithosphere is part of both the crust and the mantle.

It is the surface layer of the earth and also the most rigid layer. It is formed by the crust and the outermost part of the mantle. It is divided into two types: continental lithosphere and oceanic lithosphere.

The oceanic lithosphere has an approximate thickness of 50 - 100km, and the continental olithosphere of 40 - 200km.

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4 years ago

Calculate the force of gravity on the 0.50-kg mass if it were 6.4×106 m above earth's surface (that is, if it were two earth rad

Sunny_sXe [5.5K]

Radius of Earth is given as

$R = 6.4 * 10^6 m$

now here the height from the surface of earth is same as that of radius

$h = 6.4 * 10^6 m$

now here the acceleration due to gravity at this height is given as

$g' = \frac{GM}{(R+h)^2}$

$g' = \frac{GM}{4R^2}$

$g' = \frac{g}{4}$

now the force of gravity on the given object will be

$F = mg'$

$F = m*\frac{g}{4}$

$F = 0.5 * \frac{9.8}{4}$

$F = 1.225 N$

<em>so the force of gravity on it is 1.225 N</em>

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