Briefly explain the following concepts: (a) The reason that X-ray telescopes are placed in the space. (b) The Oort Cloud (c) How a main-sequence star can stay stable? (d) The vernal equinox (both the day, and the point)

Q: What type of fault has both strike-slip and shortening components? Select the one best answer. Group…

A: Fault is a fracture or zone of fractures between two blocks of rock. It allows blocks to move…

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A: A black hole is a region in space in which gravity pulls so that even light cannot escape. There is…

Q: Which of the following would be an effective strategy to reduce the dead zones at the mouth of the…

A: Dead zones are low-oxygen regions or hypoxic regions withinside the world’s lakes and oceans. As…

Q: What source is likely to become the most used in the future? Why?

A: Note: As the "source" is mentioned in the question here I'm considering it as an "energy source".…

Q: Which description of New Orleans, Louisiana, uses the essential elements of physical systems? Select…

A: Answer:- (D):-Sea levels have been risen and fallen erratically over the past century.  Because, as…

Q: There are many careers in the area of earth science. In which of the careers above would you study…

A: The formation of the earth can be dated back to around 4.5 billion years. In the initial phases of…

Q: How is resilient community different from a non-resilient community?

A: This is how a resilient community is different from a non - resilient community:- ●A resilient…

Q: The signature chipped stone tool of the Fertile Crescent BSR was   a. The blade industry   b.…

A: Fertile crescent was the home of early human civilization. It was the major place of many inventions…

Q: Evaluation of the Water Quality in United States Watersheds, 2000 14% 33% 33% Insufficient…

A: D. Over 50% of the water in watersheds may pose a health risk.

Q: In which stage of the demographic transition does population increase the most? Is growth greatest…

A: There are four stages of demographic transition. These are - (1) Pre-Industrial, (2) Transitional,…

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A: New moon is when the sun and moon are aligned with the Earth and sun on opposite sides of the moon.…

Q: 5. A slickenside surface dips N10°E,80°W. Fibrous slickenlines on the surface trend N60°W. (a) What…

A: The question mentioned is a practical-based question performed to determine the dimensions of…

Q: Describe the age structures in rapidly growing countries, slowly growing countries, and countries…

A: The development and economy of populace relies upon the age structure. The age structure orders…

Q: when the soil becomes saturated that water would continue to move downward to replenish water tables…

A: Almost all of the country's pure water comes from underground sources. It can either remain…

Q: Many deserts are found at 30° degrees of latitude both in the north and south. Why? Because…

A: Warm air expands; thus, the density decreases and moves upward. On the contrary, cold is heavier and…

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A: Schwarzschild radius was first discovered by Karl Schwarzschild in 1916. It is defined as the radius…

Q: An aquifer is rock or sediment that has a. low permeability and low porosity. b. low permeability…

A: An aquifer is an underground body of porous rock or sediment which is saturated with groundwater.…

Q: Conservation advocates from industrialized nations havelong pushed to set aside land in…

A: Given question is, Conservation advocates from industrialized nations have long pushed to set aside…

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A: The Milky Way incorporates our Solar System, with the name depicting the universe's appearance from…

Q: What type of faulting Occurs as a result of extension? Select the one answer. Thrust Reverse Normal

A: In nature generally three types of faulting take place- 1) Normal faulting 2) Reverse Faulting…

Q: Which of the following stars  is the hottest?   Question 14 options:   Spica – Type B   Proxima…

A: Solution

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A: Stars are classified on the basis of relative strengths of hydrogen lines in stars' atmosphere…

Q: Different types of volcanoes erupt in different ways. Some volcanoes erupt with lots of flowing…

A: 1. The explosive volcanic eruptions throw hot ash and cinders. The gas forms bubbles, which create…

Q: Questions 21 and 22 are based on the following passage. Os notrabuc Off the coast of Chile and Peru,…

A: 21. According to the passage, El Nino occurs with failed trade winds. Thus, a conclusion that can be…

Q: Which of the following stars has the longest lifetime?   Question 10 options:   Proxima Centauri –…

A: Stars are classified on the basis of relative strengths of hydrogen lines in stars' atmosphere. The…

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A: Solution

Q: Direction: Pick from the box the term that will complete each statement. renewable effect cooling…

A: 1. A/an hydrothermal reservoir is an underground source of hot water or stream for man-made use.…

Q: Identify one weather variable and explain how it would affect the formation or level of industrial…

A: Smog may be defined as a combination of smoke and fog.  Smog is mainly caused by heavy traffic,…

Q: Gravity is responsible for which of the following characteristics of a galaxy?

A: Gravity is responsible for the motion of all the objects within it.