Main sequence star - Study guides, Class notes & Summaries

Life Cycle of Stars Brain Pop Quiz with Complete Solutions What is a stellar nursery?q A cloud of gas and dust What does the prefix "proto" mean? "first" or "before" In what order do these stages of a low-mass star occur? [Red giant, white dwarf, main sequence star] Main sequence star, red giant, white dwarf What is the process of nuclear fusion, as it occurs inside our Sun? Hydrogen atoms combine to make helium atoms What effect does gravity have on stars? It forms sta...

A black car left in the sunlight becomes hotter than a white car left in the sunlight under the same conditions because - ️️the white car reflects more sunlight than the black car. A planet is detected via the Doppler technique. The velocity change of the star is a measure of - ️️the planet's mass and orbital distance. A planet will have bands in its atmosphere like Jupiter and Saturn if - ️️the planet has a high temperature. A prism is able to spread white light out into a spect...

The figure below shows an H-R diagram, with five stars labeled A through E. Which star has the highest temperature? - correct answer A If the sun was not currently in hydrostatic equilibrium, we would see? - correct answer the suns radius increasing and decreasing Which part of the sun is visible around the shadow of the moon? - correct answer chromosphere Stars that have spectral Type B _____ in temperature compared with stars that have spectral type M. - correct answer are hotter T...

Multiple Subjects Praxis - Science (5005) Form 1 Questions and Answers Already Passed Which of the following represents a biome? A. An extended family of chimpanzees B. A stand of bamboo C. An orchid and the insects that feed on it D. A tropical rain forest Option (D) is correct. A biome is a large geographic area with a climate that supports distinctive plant and animal groups. A tropical rain forest is an example of a biome. Which of the following planets is closest to the Sun? A. Mars ...

In MRI, substances respond to a specific radio frequency which is known as: - Resonance frequency The effects of main magnetic field inhomogeneities on the FID signal are corrected for in a Spin-echo sequence by applying a second radio-frequency pulse. The flip angle of this radio-frequency pulse is: - 180 degrees The components of the Gyro-magnetic ratio are: - Magnetic moment to angular momentum Which type of electromagnetic coils produce smaller magnetic field which allow spatial locali...

A curious fact about the structure of the planet Jupiter, compared to that of Earth, is that it has - much greater mass but much lower average density. A good example of a positive feedback effect in global warming is that melting sea ice causes a decrease in the Earth's albedo, meaning we absorb more sunlight than ever. T/F - T A main sequence star of mass 3 M☉has a luminosity of approximately 50 L☉. How long is the Main Sequence phase for such a star? - 6 x 10^8 years A planet can o...

Where does (did) a hub send data? A. Only to the receiving system B. Only to the sending system C. To all the systems connected to the hub D. Only to the server - correct answer To all the systems connected to the hub; A hub sends data to all the systems connected to it. What uniquely identifies every NIC? A. IP address B. Media access control address C. ISO number D. Packet ID number - correct answer Media Access Control (MAC) address What Windows utility do you use to find the MA...

Space Exploration|Complete Questions with A+ Graded Answers main sequence a diagonal area on an H-R diagram that includes more than 90 percent of all stars white dwarf A small, hot, dim star that is the leftover center of an old star Luminosity the true brightness of an object light year the distance light travels in one year blueshifted the doppler shift toward shorter wavelengths of light from an approaching object Redshifted stars moving away from Earth Ne...

A hydrogen atom that has been photoionized is _____. - ️️An ion, a proton, and positively charged. A main sequence O star will have a ___ temperature, a ____ radius, a ____ luminosity and a ____ absolute magnitude than a main sequence G star like the Sun. - ️️larger, larger, larger, smaller A star that is 50 pc away will show a parallax of _____. - ️️.02 arc secs A star with T=10,000 K (spectral type A) shows strong absorption lines from _______. - ️️neutral hydrogen (H I) ac...

What were the early ideas of how the Sun shines? Why were these ideas incorrect? Why does the Sun shine? - Answer-Chemical burning was what humans thought made the sun shine. However, if this was true- the sun would be like a campfire that would need a fuel source and to be "fed" periodically. The Sun shines due to nuclear fusion Be able to name the Sun's layers from inside to outside and be able to know the importance of each layer (e.g. what type of light does the chromosphere emit?) -...