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3 years ago

Compared to a stationary galaxy, light from a galaxy that is moving away from earth will appear _____.

2 answers:

3 0

"B" When an object moves away from us, the light is shifted to the red end of the spectrum, as its wavelengths get longer.

nikklg [1K]3 years ago

3 0

Answer:

B) Redder

Explanation:

Think of it like this; a car passes by you, as it goes, it's horn gets louder, and then starts to become quieter as it moves further away. Redshift works the same way. When an galaxy starts to move away from Earth, it's light <em>appears </em>to be redder. (If it was moving closer to Earth, it would most likely become bluer.)

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Titania, the largest moon of the planet Uranus, has 1/8 the radius of the earth and 1/1700 the mass of the earth.What is the acc

garri49 [273]

Answer:

(a). The acceleration due to gravity at the surface of Titania is 0.37 m/s².

(b). The average density of Titania is 1656.47 kg/m³

Explanation:

Given that,

Radius of Titania $R_{t}= \dfrac{1}{8}R_{e}$

Mass of Titania $M_{t}= \dfrac{1}{1700}M_{e}$

We need to calculate the acceleration due to gravity at the surface of Titania

Using formula of the acceleration due to gravity on earth

$g_{e}=\dfrac{GM_{e}}{R_{e}^2}$

The acceleration due to gravity on Titania

$g_{t}=\dfrac{GM_{t}}{R_{t}^2}$

Put the value into the formula

$g_{t}=\dfrac{G\times\dfrac{1}{1700}M_{e}}{(\dfrac{1}{8}R_{e})^2}$

$g_{t}=\dfrac{64}{1700}\times G\dfrac{M_{e}}{R_{e}^2}$

$g_{t}=0.004705 g_{e}$

$g_{t}=0.03764\times9.8$

$g_{t}=0.37\ m/s^2$

The acceleration due to gravity at the surface of Titania is 0.37 m/s².

(b). We assume Titania is a sphere

The average density of the earth is 5500 kg/m³.

We need to calculate the average density of Titania

Using formula of density

$\rho=\dfrac{m}{V}$

$\rho_{t}=\dfrac{M_{t}}{\dfrac{4}{3}\pi\times R_{t}^2}$

$\rho_{t}=\dfrac{\dfrac{M_{e}}{1700}}{\dfrac{4}{3}\pi\times(\dfrac{R_{e}}{8})^2}$

$\rho_{t}=\dfrac{512}{1700}\times\rho_{e}$

$\rho_{t}=\dfrac{512}{1700}\times5500$

$\rho_{t}=1656.47\ kg/m^{3}$

The average density of Titania is 1656.47 kg/m³

Hence, (a). The acceleration due to gravity at the surface of Titania is 0.37 m/s².

(b). The average density of Titania is 1656.47 kg/m³

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3 years ago

Whats is the conclusion of the mass on the period of spring?

Alchen [17]

Answer:

Explanation:

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