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ASTR 1346 - STELLAR EVOLUTION OF SUNLIKE STARS QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
Why do red dwarfs have long stellar lifetimes? AnsThey have low rates of fusion and low luminosities The highest mass star known - at an unstable, tremendous 300 solar masses - is: AnsR136A1 A "low mass" star might have a mass comparable to: Ans1860× the mass of all of our Solar System's planets combined (2.5× the mass of the Sun) Degenerate matter is: AnsHigh density matter propped up by pressure exerted by extremely high velocity subatomic particles, like ...
- Exam (elaborations)
- • 9 pages •
Why do red dwarfs have long stellar lifetimes? AnsThey have low rates of fusion and low luminosities The highest mass star known - at an unstable, tremendous 300 solar masses - is: AnsR136A1 A "low mass" star might have a mass comparable to: Ans1860× the mass of all of our Solar System's planets combined (2.5× the mass of the Sun) Degenerate matter is: AnsHigh density matter propped up by pressure exerted by extremely high velocity subatomic particles, like ...
ASTRONOMY TEST 1 QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
The point in the sky directly above your head at any given time is called the Anszenith The celestial sphere turns once around each day because Ansthe celestial sphere does not move, is the earth that turns around once each day The south celestial pole and the north celestial pole lie in the sky directly above the Ansnorth and south poles Halfway between the celestial poles lies the AnsThe celestial equator In the Northern Hemisphere, the altitude (height in degrees...
- Exam (elaborations)
- • 17 pages •
The point in the sky directly above your head at any given time is called the Anszenith The celestial sphere turns once around each day because Ansthe celestial sphere does not move, is the earth that turns around once each day The south celestial pole and the north celestial pole lie in the sky directly above the Ansnorth and south poles Halfway between the celestial poles lies the AnsThe celestial equator In the Northern Hemisphere, the altitude (height in degrees...
AST: OVERVIEW OF OUR PLANETARY SYSTEM QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
What is the most important reason that astronomers have learned more about our planetary system in the last 30-40 years than all of history before then. AnsWe have been able to send spacecraft to gather information about planets and moons up close. The planet closest to the Sun in the solar system is: AnsMercury Which planet in the solar system has not been examined by spacecraft instruments that have either flown by or orbited them? Ans In the far future, a visiting touri...
- Exam (elaborations)
- • 5 pages •
What is the most important reason that astronomers have learned more about our planetary system in the last 30-40 years than all of history before then. AnsWe have been able to send spacecraft to gather information about planets and moons up close. The planet closest to the Sun in the solar system is: AnsMercury Which planet in the solar system has not been examined by spacecraft instruments that have either flown by or orbited them? Ans In the far future, a visiting touri...
ASTR LAB FINAL EXAM GUIDE QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
8.59 x 10^6 to scientific notation Ans8590000 6.35 x 10^9 to scientific notation Ans Which of the following SI units could be used to measure the ambient temperature? AnsKelvin Convert m to gm 9,780,000,000 m Ans9,780,000,000 x 1 Gm/1,000,000,000 = 9.78Gm When can we say that a number is written in scientific notation? Answhen a number between 1 and 10 is multiplied by a power of 10 Which of the following coordinate system is observer centered? AnsHorizontal...
- Exam (elaborations)
- • 9 pages •
8.59 x 10^6 to scientific notation Ans8590000 6.35 x 10^9 to scientific notation Ans Which of the following SI units could be used to measure the ambient temperature? AnsKelvin Convert m to gm 9,780,000,000 m Ans9,780,000,000 x 1 Gm/1,000,000,000 = 9.78Gm When can we say that a number is written in scientific notation? Answhen a number between 1 and 10 is multiplied by a power of 10 Which of the following coordinate system is observer centered? AnsHorizontal...
ASTR 1346 EXAM 1 QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
The Electromagnetic Spectrum AnsVisible light is the particular type of electromagnetic radiation --- to which our eyes happen to be sensitive. There is invisible EM radiation, which goes undetected by our eyes. Ansradio, infrared, ultraviolet, x rays and gamma rays The only characteristic distinguishing one from another is.. Answavelength or frequency. Where do these radiations travel through? AnsAll these radiation travel with the speed of light All these radiatio...
- Exam (elaborations)
- • 15 pages •
The Electromagnetic Spectrum AnsVisible light is the particular type of electromagnetic radiation --- to which our eyes happen to be sensitive. There is invisible EM radiation, which goes undetected by our eyes. Ansradio, infrared, ultraviolet, x rays and gamma rays The only characteristic distinguishing one from another is.. Answavelength or frequency. Where do these radiations travel through? AnsAll these radiation travel with the speed of light All these radiatio...
ASTR 1346 FINAL QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
The picture below shows the Hubble Telescope's view of the 4-billion light-year distant Abell 370 cluster (many of the fuzzy, yellowish blobs are light from large elliptical galaxies or the nuclear bulges of spiral galaxies). Throughout the picture, you may notice streaks of light (two of such which are highlighted in yellow boxes in the photograph). What are those semi-circular arcs and streaks of light? AnsThe light of even more distant background galaxies bent and distorted by ...
- Exam (elaborations)
- • 13 pages •
The picture below shows the Hubble Telescope's view of the 4-billion light-year distant Abell 370 cluster (many of the fuzzy, yellowish blobs are light from large elliptical galaxies or the nuclear bulges of spiral galaxies). Throughout the picture, you may notice streaks of light (two of such which are highlighted in yellow boxes in the photograph). What are those semi-circular arcs and streaks of light? AnsThe light of even more distant background galaxies bent and distorted by ...
ASTR 1346 - TEST 2 - STARS QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
The helium flash: AnsIs the sudden onset of helium nuclear fusion in the core of a red giant How does the presence of "helium ash" affect a star like the Sun? AnsIt cannot be fused any further without drastic internal changes, forcing fusion to occur in a shell outside of the core Over the next few billion years, the Sun's luminosity will increase steadily as its core is depleted of hydrogen. Taking samples of the Sun's luminosity at different ages (with its curre...
- Exam (elaborations)
- • 6 pages •
The helium flash: AnsIs the sudden onset of helium nuclear fusion in the core of a red giant How does the presence of "helium ash" affect a star like the Sun? AnsIt cannot be fused any further without drastic internal changes, forcing fusion to occur in a shell outside of the core Over the next few billion years, the Sun's luminosity will increase steadily as its core is depleted of hydrogen. Taking samples of the Sun's luminosity at different ages (with its curre...
ASTR 1346 TEST 1 QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
what radiation has the shortest wavelength but greatest frequency? Ansgamma rays what radiation has the longest wavelength but least frequency? Ansradio waves order of electromagnetic spectrum Ansgamma rays, x-rays, ultraviolet, visible, infrared, microwave, radio what radiation does not pass through the earth's atmosphere? Ansgamma, x-ray, and most uv and infrared what radiation passes through the earth's atmosphere? Ansvisible and radio waves
- Exam (elaborations)
- • 8 pages •
what radiation has the shortest wavelength but greatest frequency? Ansgamma rays what radiation has the longest wavelength but least frequency? Ansradio waves order of electromagnetic spectrum Ansgamma rays, x-rays, ultraviolet, visible, infrared, microwave, radio what radiation does not pass through the earth's atmosphere? Ansgamma, x-ray, and most uv and infrared what radiation passes through the earth's atmosphere? Ansvisible and radio waves
ASTR 1346 TEST 3 QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
What is a galaxy? AnsA huge collection of stellar and interstellar matter---stars, gas, neutron stars, black holes etc--- isolated in space and held together by its own gravity What did the Shapley Curtis debate argue? AnsThe scale of the universe What did Shapley believe? AnsSpiral nebulae are relatively small, nearby objects scattered around our galaxy What did Curtis believe? AnsEach of these spiral nebulae is a separate rotating system of stars much like our own gala...
- Exam (elaborations)
- • 53 pages •
What is a galaxy? AnsA huge collection of stellar and interstellar matter---stars, gas, neutron stars, black holes etc--- isolated in space and held together by its own gravity What did the Shapley Curtis debate argue? AnsThe scale of the universe What did Shapley believe? AnsSpiral nebulae are relatively small, nearby objects scattered around our galaxy What did Curtis believe? AnsEach of these spiral nebulae is a separate rotating system of stars much like our own gala...
ECON 2306 EXAM 3 WEHR MACROECONOMICS TEST #1 QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
ECON 2306 EXAM 3 WEHR MACROECONOMICS TEST #1 QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
- Exam (elaborations)
- • 9 pages •
ECON 2306 EXAM 3 WEHR MACROECONOMICS TEST #1 QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
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MAE 1351 FINAL COMPREHENSIVE EXAM QUESTIONS WITH DETAILED VERIFIED AND 100% ACCURATE ANSWERS BRAND NEW EXAM ALREADY GRADED A+ PASS
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