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vivado [14]
3 years ago
15

For Cepheid Variable stars, what property of those stars can be observed that reveal its TRUE brightness (which can then be used

to calculate distance)?
Physics
1 answer:
just olya [345]3 years ago
8 0

Answer:

Pulsation period

Explanation:

Cepheid Variable stars are stars that have a changing diameter which causes a change in the luminosity of the star.

The relation between luminosity and pulsation period was discovered by Henrietta Swan Leavitt. Edwin Hubble later modified the relation where the Cepheid variables which were considered to be in the Milky way were discovered to be in the Andromeda Galaxy.

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Heat thansfer that happens from a distance is called:
yaroslaw [1]

B. convection is the answer

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Characteristics we use to tell the difference between kinds of matter are called___ properties
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I believe it's called qualitative

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Compare an earthquake with a Richter scale magnitude of 5.5 to one with a magnitude of 7.5.
maksim [4K]
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3 years ago
Which equations could be used as is, or rearranged to calculate for frequency of a wave? Check all that apply.
amm1812
-- Equations  #2  and  #6  are both the same equation,
and are both correct.

-- If you divide each side by  'wavelength', you get Equation #4,
which is also correct.

-- If you divide each side by  'frequency', you get Equation #3,
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Summary:

-- Equations #2, #3, #4, and #6 are all correct statements,
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7 0
3 years ago
Read 2 more answers
HELP!!! What role might electrostatic force play in spider dispersal, according to a recent study?
Marat540 [252]

The positively charged atmosphere attracts negatively charged spider silk, might electrostatic force play in spider dispersal, according to a recent study.

Answer: Option C

<u>Explanation:</u>

The positive charge present in upper of the atmosphere and the negative charge on planet’s surface. During cloudless skies days, the air possesses a voltage of nearly around 100 volts for each and every meter from above the ground.

Ballooning spiders process within this planetary electric field. When their silk relieve their bodies then it picks up a negative charge. This oppose the similar negative charges on the surfaces on which the spiders settles and create sufficient force to lift them into the air. And spiders can hike those forces by climbing onto blades of grass,twigs, or leaves.

6 0
3 years ago
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