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2 years ago

How does the appearance of spiral galaxies vary? Select the two correct answers.

Physics

2 answers:

Levart [38]2 years ago

8 0

Answer:

A. And D.

A. They vary in how tightly their arms are wound.

D. Some have a band of stars and materials through their middle, but others do not.

andrew-mc [135]2 years ago

6 0

The appearance of spiral galaxies vary in the following ways:

A. They vary in how tightly their arms are wound.

D. Some have a band of stars and materials through their middle, but others do not

Spiral galaxies are the galaxies where the gas clouds and the stars are concentrated in spiral arms.

Examples of spiral galaxies include<em> Milky way, Sunflower Galaxy, Andromeda Galaxy, </em>etc.

It should be noted that <em>spiral galaxies</em> vary in how tightly their arms are wound while some have a band of stars and materials through their middle, but others do not.

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Which type of force describes the force applied to an object?

SCORPION-xisa [38]

Force of gravity. Hope this is correct good luck!!

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2 years ago

Read 2 more answers

A guitar string vibrates at a frequency of 330Hz with wavelength 1.40m. The frequency and wavelength of this sound wave in air (

bixtya [17]

Answer:

Same frequency, shorter wavelength

Explanation:

The speed of a wave is given by

$v=f\lambda$

$\lambda=\dfrac{v}{f}$

where,

f = Frequency

$\lambda$ = Wavelength

It can be seen that the wavelength is directly proportional to the velocity.

Here the frequency of the sound does not change.

But the velocity of the sound in air is slower.

Hence, the frequency remains same and the wavelength shortens.

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3 years ago

In a shipping company distribution center, an open cart of mass 50.0 kg is rolling to the left at a speed of 5.00 m/s. Ignore fr

spin [16.1K]

Answer:

a) $v_p=9.35m/s$

Explanation:

From the question we are told that:

Open cart of mass $M_o=50.0 kg$

Speed of cart $V=5.00m/s$

Mass of package $M_p=15.0kg$

Speed of package at end of chute $V_c=3.00m/s$

Angle of inclination $\angle =37$

Distance of chute from bottom of cart $d_x=4.00m$

Generally the equation for work energy theory is mathematically given by

$\frac{1}{2}mu^2+mgh=\frac{1}{2}mv_p^2$

Therefore

$\frac{1}{2}u^2+gh=\frac{1}{2}v_p^2$

$v_p=\sqrt{2(\frac{1}{2}u^2+gh)}$

$v_p=\sqrt{2(\frac{1}{2}v_c^2+gd_x)}$

$v_p=\sqrt{2(\frac{1}{2}(3)^2+(9.8)(4))}$

$v_p=9.35m/s$

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2 years ago

Which of the following is least likely to be a scientific experiment?

nikitadnepr [17]

D should be the answer

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2 years ago

The spring of a spring balance is 6.0 in. long when there is no weight on the balance, and it is 8.4 in. long with 4.0 lb hung f

Sergeeva-Olga [200]

Answer:

W = 55.12 J

Explanation:

Given,

Natural length = 6 in

Force = 4 lb, stretched length = 8.4 in

We know,

F = k x

k is spring constant

4 = k (8.4-6)

k = 1.67 lb/in

Work done to stretch the spring to 10.1 in.

$W =k\int_{6}^{10.1} x$

$W = \dfrac{k}{2}[x^2]_6^{10.1}$

$W = \dfrac{1}{2}\times 1.67\times (10.1^2-6.0^2)$

W = 55.12 J

Work done in stretching spring from 6 in to 10.1 in is equal to 55.12 J.

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3 years ago

How does the appearance of spiral galaxies vary? *Select the two correct answers.*

How does the appearance of spiral galaxies vary? Select the two correct answers.