Explain why stars form only in molecular clouds, the coldest, densest parts of the interstellar medium....
Explain why stars form only in molecular clouds, the coldest, densest parts of the interstellar medium. NO PLAGIARISM PLEASE
Homework Answers
A cloud collapses and ultimately forms stars when gravity overcomes thermal pressure. The latter depends both on the density and temperature of the cloud. The high densities in molecular clouds means that the gravitational forces are relatively strong but the pressure is no higher than elsewhere because the temperatures are low .
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Explain why stars form only in molecular clouds, the coldest, densest parts of the interstellar medium....
2. The circle of life! Stars are formed in dense molecular clouds. Can stars return the...
2. The circle of life! Stars are formed in dense molecular clouds. Can stars return the mass to the interstellar space [1 pt)? Please describe two processes that stars return its mass to the interstellar space [2 pts each, 4pts in total). After one cycle, which properties of the interstellar gas have changed [2 pts]?
Stars form from the gravitational collapse of clouds of interstellar ("between the stars") gas. To simplify...
Stars form from the gravitational collapse of clouds of interstellar ("between the stars") gas. To simplify the situation, assume that a single star forms from a uniform, spherical cloud of gas of mass 2.0 x 1030 kg and radius 1.0 x 1013 m. 2. Before it begins to collapse, the cloud is rotating with a period of 1.4 million years. What is the angular speed of the cloud? (2.26 × 10-14 rev/s) The cloud eventually collapses to form a star...
3. Do all parts and explain! a. What is the most likely molecular formula of a...
3. Do all parts and explain! a. What is the most likely molecular formula of a compound (that contains only C, H and O) which has a molecular ion in the EI mass spectrum with m/z of 104 and an M+1 peak that is 5.5% of the intensity of the molecular ion peak? b. What is the most likely molecular formula of a compound that has a molecular ion in the EI mass spectrum with m/z of 136, with a...
Explain why only alkali metals form solid stable hydrogen carbonate (bicarbonate) salts.
Explain why only alkali metals form solid stable hydrogen carbonate (bicarbonate) salts.
Please explain in details. For cell culture medium, 1. Why cell need 5% CO2? Humidity is...
Please explain in details. For cell culture medium, 1. Why cell need 5% CO2? Humidity is typically >95%? •Why use ethanol to sterilize equipment? •Why use iodine and methylene blue to stain plant and human cell, respectively? 2)Describe in detail about how to prepare low, medium and high density cultures. Show steps by steps calculation.
genetics- please explain in paragraph Why is cDNA of such practical importance to molecular biolog
genetics- please explain in paragraph
Why is cDNA of such practical importance to molecular biolog
1 a) Explain why a real gas that expands is cooled. Why is this effect only...
1 a) Explain why a real gas that expands is cooled. Why is this effect only obtained at temperatures below 40 K for helium? b) Calculate the mean path and root mean square velocity of helium atoms at 101.3 kPa and 40 K. c) How would the medium path be affected for a gas trapped in a steel cylinder if heated?
Please explain In detail why the solution is A 16. What is the molecular formula corresponding...
Please explain In detail why the solution is A
16. What is the molecular formula corresponding to the structural formula below? A. CeH1 D. C8H12 B. C6He E. C8H6 C. CeH
2. Explain at the molecular level why this relationship exists between temperature and solubility. please answer any gen...
2. Explain at the molecular level why this relationship exists between temperature and solubility. please answer any general answer.
(a) Determine the ar geometry of Sef4 using the VSEPR model. Select The molecular geometry of SeF4 i (b) Explain why...
(a) Determine the ar geometry of Sef4 using the VSEPR model. Select The molecular geometry of SeF4 i (b) Explain why the molecular geometry of SeFs is different from that of IF, although they have similar electron-domain Although both Sefs and IF, have the electron-domain geometry of Select lone electron pair(s) in theSelect positions. Accordingly, the molecular geometry of Sefs is Select.. . IF has lone pair(s) of electrons whereas SeF4 has only ' | , but that of 1F3...
2. The circle of life! Stars are formed in dense molecular clouds. Can stars return the mass to the interstellar space [1 pt)? Please describe two processes that stars return its mass to the interstellar space [2 pts each, 4pts in total). After one cycle, which properties of the interstellar gas have changed [2 pts]?
Stars form from the gravitational collapse of clouds of interstellar ("between the stars") gas. To simplify the situation, assume that a single star forms from a uniform, spherical cloud of gas of mass 2.0 x 1030 kg and radius 1.0 x 1013 m. 2. Before it begins to collapse, the cloud is rotating with a period of 1.4 million years. What is the angular speed of the cloud? (2.26 × 10-14 rev/s) The cloud eventually collapses to form a star...
genetics- please explain in paragraph
Why is cDNA of such practical importance to molecular biolog
Please explain In detail why the solution is A
16. What is the molecular formula corresponding to the structural formula below? A. CeH1 D. C8H12 B. C6He E. C8H6 C. CeH
(a) Determine the ar geometry of Sef4 using the VSEPR model. Select The molecular geometry of SeF4 i (b) Explain why the molecular geometry of SeFs is different from that of IF, although they have similar electron-domain Although both Sefs and IF, have the electron-domain geometry of Select lone electron pair(s) in theSelect positions. Accordingly, the molecular geometry of Sefs is Select.. . IF has lone pair(s) of electrons whereas SeF4 has only ' | , but that of 1F3...
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