Planetary nebulae are   a. the expanding shells of a dying star.   b. the site of planet formation.   c. the leftovers after a star explodes as a supernova.   d. the birthplace of stars.   e. none of these.

Q: ANALYZING.  GIVEN THE FOLLOWING SCENARIOS, ANSWER WHAT IS ASKED.  A storm hit a certain area. After ...

A: A storm is an extreme condition of disturbance of the weather. During it, fierce winds, lightning, a...

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A: Binary stars are stars with 2 stars orbiting them. they usually appear as single point light source ...

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A: Water is an important natural resource and is abundant on Earth. It is found in many places such as ...

Q: What are the three main types of nebulae

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A: Weather forecasting is the utilization of science and technology for predicting the atmospheric cond...

Q: Stars within a cluster that are at the turnoff point   a. have life expectancies that are equal ...

A: The universe is all the time and space that includes all the galaxies, stars, planets, and all forms...

Q: What causes the outward pressure that balances the inward pull of gravity in a star?   a. the ou...

A: The nuclei of stars collide with each other. In the process, lot of energy releases and moves outwar...

Q: why does cold air holds less moisture (water vapor) than warm air ?

A:  Air moisture is counted on the basis of molecules of vapor present in air. The water vapor present ...

Q: Draw the general pattern for the atmospheric circulation of the Northern Hemisphere (without looking...

A: The atmosphere circulation was driven by the pressure difference produced by the variation in insola...

Q: How fast does a tsunami move?

A: Tsunami is said to be repeated types of waves that hit the coast at a larger volume. This results in...

Q: The blue arrows represent the force of ?

A: In the given figure, a small body (represented by a small black dot) is orbiting around a large body...

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A: The large cities : is a series of nearly contiguous metropolitan areas, which may be somewhat separa...

Q: How do the different geological hazards affect the Earth’s subsystems? how can you help the victims ...

A: Let us discuss something related to geological hazards, Geological natural hazards are earthquakes, ...

Q: Generally, which of these has the primary influence on the temperature of a planet's surface? ...

A: Although every factor mentioned above influences the temperature of a planet but primarily the dista...

Q: Which of the following is NOT evidence of the existence of an interstellar medium?   a. extincti...

A: Firstly, let us discuss something about the interstellar medium, Interstellar medium(ISM):  The matt...

Q: Computer engineering question

A: # cook your dish here mod=1000000007 def mmul(A,B):     s=len(A)     C=[[0 for i in range(s)]for j ...

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A: Soil is the uppermost layer of Earth, which is a mixture of minerals, organic matter, gas, water, et...

Q: Why does our relatively small Moon have a greater tidal effect on Earth than the gigantic Sun?

A: Tides are long-period waves that move through ocean and water bodies. They occur due to the gravitat...

Q: Word Definition weather climate

A: Meteorology is a branch of atmospheric science which uses chemistry and atmospheric physic to study ...

Q: Why does the fusion of heavier atoms require higher temperatures than the fusion of hydrogen?

A: Firstly, let us discuss something about hydrogen, Hydrogen: the symbol is H  atomic number 1   the ...

Q: Please answer the two sections in this question

A: Energy is very essential for human civilization to develop. Energy is required for industries, house...

Q: ____________________ rock forms from the crystallization of a melt.

A: The rocks those that are formed by the process of crystal development and the removal or separation ...

Q: Could you answer each four sections on the photo

A: Earth science is the study of the Earth and the various processes that are going on in the Earth sys...

Q: At the end of the Cretaceous, a mass extinction event caused the dinosaurs to go extinct. Many scien...

A: Climate changes are influential and long-term changes that may include the average temperature, the ...

Q: Which main-sequence star would be the most luminous?   a. G1   b. G5   c. G9   d. F0...

A: The source of energy characterizes the main sequence star. The fusion of hydrogen into helium underg...

Q: The lowest-mass stars CANNOT become giants because   a. they do not contain helium.   b. the...

A: Ever since the beginning of the Universe, matter and energy were created. These matters and energy e...

Q: Identify the fire class and the type of extinguisher appropriate for each fire situation. (a)Bonfire...

A: Fire class is a system which categorising fire, which is based on type of material and fuel used for...

Q: Why the universe is expanding?

A: The distance increasing between the objects of the universe is referring to the universe's expansion...

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A: Tornado are kind of natural disaster in which a rotating column of air is present which is in contac...

Q: Why do you think the mid-ocean ridges are higher than the surrounding seabed?

A: Earth is a terrestrial planet, meaning it has a rocky surface primarily made up of silicate rocks an...

Q: List five to ten effects of changing climate.

A: The average weather of any location which is affected by its attitude, altitude as well as oceans an...

Q: How can wind-driven horizontal movement of water induce vertical movement in surface water?

A: The rise and fall of water in the oceans and seas is referred to as the vertical motion of water. Th...

Q: What is climax community ?

A: Climates of particular regions determine their plant and animal communities that can able to survive...

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A: Earthquake is violent shaking of the ground. This is caused by energy released by the lithosphere wh...

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A: The given graph is of the country of Alaska where the Average annual graph of the climate change and...

Q: Does the temperature increase or decrease with altitude in the: a. Troposphere? b. Stratosphere? c. ...

A: In the troposphere, the temperature decreases with increasing altitude.  In the stratosphere tempera...

Q: What is the relative order (from oldest to youngest) of the layers in this cross section?

A: Relative dating is finding age of rock relative to other event or fossils or structure present near ...

Q: What’s happening to the lava in the lava lake inside the volcano in Ethiopia? What largescale proces...

A: In the lava lake, lava flows like fountains. Currently, the lava lake is increasing again because of...

Q: How did volcanic activity influence the early development of life on Earth?

A: There are two important gases, which support the life and that are oxygen and carbon dioxide. Oxygen...

Q: What are some advantages and disadvantages of large hydroelectric dams?

A: Hydroelectricity is produced when water is made to flow or fall from a great height on the ground wh...

Q: A star’s luminosity depends only on the star’s   a. distance and diameter.   b. temperature ...

A: Stars are one of the most important parts of our universe as they are the one who are at the center ...

Q: Genetic classification uses ____________________ to identify and study different types of rock.

A:  Genetic classification uses the texture and composition of a rock to classify it.

Q: Help me

A: Hertzsprung Russell diagram or H-R diagram is a plot of star where all stars are placed with respect...

Q: 1. elevation of the two index contours 2. Elevation of the "spot" 3. What is the contour interval 4....

A: Contour- The contours are imaginary lines joining places lying at the same height above the mean sea...

Q: The star Algol is   a. an astrometric binary.   b. a single line spectroscopic binary.   ...

A: The  star Algol can be visible easily changing its brightness, when it is at its highest brightness ...

Q: If you moved three times farther from a star, the star would appear to be how many times fainter? ...

A: Firstly, let us discuss something about the star, Star: It is an astronomical object consisting of a...

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A: Abyssal-plains are underwater flat and plain surfaces that are found on the ocean-floor and vary at ...

Q: Why was the oxygen revolution necessary for the evolution of animals?

A: Earth is the third planet in the solar system. It is the only planet known so far that can sustain l...

Q: Emission nebulae are also called _______________________ because they are composed of ionized hydrog...

A: Nebula is interstellar giant cloud of dust and gases in space. Emission nebula are the one which are...

Q: The most massive main-sequence stars are spectral class   a. A.   b. O.   c. G.   d. ...

A: Firstly, let us discuss something about the star, Star: It is an astronomical object consisting of a...