What causes the phenomenon of "red shift" and "blue shift" in astronomy? *

constructive interference
doppler effect
different wavelengths of light
destructive interference

Answer:

doppler effect

Explanation:

The entire scientific Astronomical and Cosmological community assumes that it's the Doppler effect, since that's the only existing scientific explanation for the shifts in wavelengths away from what they're supposed to be.  The whole theoretical structure of the "Big Bang" and the expanding universe is built on that understanding.

If anybody ever comes along and discovers another way for electromagnetic waves to get longer or shorter on their way to us through space, then the whole big bang and expanding universe may be out the window.

How did the social structure of ancient Rome affect the lives of its people?



How was life for women and children in the Roman Republic different from life for women and children today?



How were the people of ancient Rome able to change their government?



How did the diverse religions of ancient Rome reflect Roman life?



How did trade in the Roman Republic lead to the development of the merchant class?



What were the main causes of the decline of the Roman Republic?

HELP ME PLEASE ASAP!!!!! WILL GIVE BRAINLIEST, FIVE STARS, AND HEART!!!!!
(picture included)

What is another name for a working circuit? *
A Open circuit
B Closed circuit
C Series circuit

Describe how the creation or message of "One Love" from the 1970s is relevant to the social problems of 2020.
Do you think there are any current musicians that are Activists? Name the musician and briefly describe why you think they are an activist.


Search entries or author

Who freed the Greek cities in Asia Minor from Persian rule? a. Philip II c. Alexander the Great b. Demosthenes d. Euclid plz hury

DUE TODAY PLEASE HELP.....WILL GIVE BRANIST!!!!!!!

Instructions: Create a comic strip detailing the adventure of your character as the character is exposed to thermal energy, causing it to undergo phase changes from a solid, to a liquid, to a gas. Place drawings inside the boxes and written content on the lines below each box.
Your presentation must include the following:
• title and introduction of your character, including what substance it is made of
• source of thermal energy your character encountered (conduction, convection, and/or radiation)
• detailed description and/or diagram of the particle transformation from solid to liquid phase
• detailed description and/or diagram of the particle transformation from liquid to gas phase

Which of the following best describes the relationship between air temperature and relative humidity?


Cold air cannot hold any water vapor.


Warm air can hold less water vapor than cold air.


Cold air can hold less water vapor than warm air.


Warm air and water vapor are measured in degrees Celsius (⁰C).

DUE TODAY PLEASE HELP.....WILL GIVE BRANIST!!!!!!!
Instructions: Create a comic strip detailing the adventure of your character as the character is exposed to thermal energy, causing it to undergo phase changes from a solid, to a liquid, to a gas. Place drawings inside the boxes and written content on the lines below each box.
Your presentation must include the following:
• title and introduction of your character, including what substance it is made of
• source of thermal energy your character encountered (conduction, convection, and/or radiation)
• detailed description and/or diagram of the particle transformation from solid to liquid phase
• detailed description and/or diagram of the particle transformation from liquid to gas phase

( do not use the ice cube story)

What is the resistance in a circuit with a 1.5-v battery and 10 amps
of current?

pls help asappppppppppp

Logically why would light move faster in vacuum than in a solid? *

light cannot travel in vacuum; it needs a medium to travel in just like mechanical waves
this is incorrect, light moves faster in a solid
in a solid light gets absorbed by atoms before coming out the other side
there's nothing for light to bounce off of in vacuum

2. Large force=____________............Small force=___________________


im confused does this make sense to anyone-?

The sun is brighter than all other stars because of its:

absolute magnitude
luminosity
apparent magnitude

How does the greenhouse effect influence the climate on Earth? 5pts
-
-
A - It prevents Earth from getting too cold
B - It prevents Earth from getting too hot
C - It traps heat from the sun
D - A and C

What idea about work and force does the diagram describe? Explain your answer.

Help me please U-U..................................................

In your own words, describe what the difference is between climate and weather. Be as specific as possible and include as much details as possible

The melting of a glacier is an example of the interactions among which of Earth’s spheres?


geosphere, troposphere, cryosphere


atmosphere, geosphere, cryosphere


atmosphere, asthenosphere, biosphere


hydrosphere, asthenosphere, atmosphere

The distance of Saturn from the sun is:

< 1 A.U.
> 1 A.U.
= 1 A.U.

An x-ray and a radio wave are both shot into outer space (they both travel in vacuum). What is the difference between the two signals? Select all that apply. *
x-ray has a higher frequency
x-ray has more energy
x-ray is faster
x-ray has a higher wavelength

The distance of Venus to the sun must be:

(= equal, > greater than, < less than)

< 1 A.U.
> 1 A.U.
= 1 A.U.

Is water wet??? Because I heard water makes things wet, therefore it cannot make itself wet.

What are Saturn’s rings mostly made of?
A.
nitrogen and helium

B.
ice and water vapor

C.
volcanic dust particles

D. chunks of ice and rock

The diagram below shows the sun and four positions, A, B, C, and D, of the moon around Earth. (1 point)

Two circles are shown. The smaller circle is on the left and is labeled Earth. It has the label B on top, C on the right, D at the bottom, and A on the left. The larger circle is labeled Sun and is on the right of the circle labeled Earth

Which of the following statements is correct about the type of tide that would be created based on the placement of the moon according to the image above?

1.If the moon is at A, a neap tide will occur because the gravitational pull of the moon cancels out some of the pull from the sun to create lower than normal tides.

2.If the moon is at B, a neap tide will occur because the moon's gravitational force increases due to the shadow of the sun.

3.If the moon is at C, a spring tide will occur because the combined gravitational pull of the moon and sun creates higher than normal tides.

4.If the moon is at D, a spring tide will occur because the sun's gravitational force is reduced due to the shadow of the moon.

What caused most of the dinosaurs to go extinct and how do scientists know?

easy question lol
Which of these stars is the hottest star?
A. Red Star
B. Yellow Star
C. Blue Star
D. Orange Star

I am stuck on this assignment for 2 weeks, Please Help me

(Science)
Which of the following situations is an example of Newton's 3rd Law?

A: To jump off the ground, your legs push down on the Earth, and it pushes you back.
B: During a game of baseball, a pitched ball stays in motion until it connects with the bat and changes direction.
C: A 250-pound linebacker exerts more force tackling the quarterback than a 150- pound player would​

Help pleaseeeeeeeee
The coating on the head of a match is highly flammable. When it burns, it releases a great deal of energy. However, before the match can burn, it must gain a small amount of energy from a spark. That spark is typically produced by striking (rubbing) the match head against a rough surface.
Sketch and describe a potential energy diagram that represents the striking and burning of the match. Remember to label the diagram with the energy changes that occur. Your answer must include the potential energy diagram and a written description.
(Note: you do not have to use actual energy values.)

Which of the following is produced by a nuclear bomb?
a. Electromagnetic, thermal, nuclear. b. Elastic, gravitational, sound.
c. Gravitational, mechanical, electrical. d. Sound, electromagnetic, smell