A. The temperature of the stars. B. The gravitational forces between the stars. C. The brightness of the stars. D. The age of the stars. 相关知识点: 试题来源: 解析 B。解析:在双星系统中,两颗恒星之间的引力决定了它们的轨道和速度。A 温度、C 亮度、D 年龄都与轨道和速度无关。反馈...
A. Its distance from other stars B. Its age C. Its mass D. The amount of dust around it 相关知识点: 试题来源: 解析 C。解析:The size and brightness of a main-sequence star depend on its mass.表明主序星的大小和亮度取决于它的质量。反馈...
Yougaingreaterconfidenceinyourself.Also,youbecomemoreoptimisticandcalmerinthemindthanbefore.Thereareseveralreasonsforthesechanges:yourself-imageimprovesasyoustartlivingintidybeautifulrooms,andyougaindecision-makingskillsasyoucontinuetochoosebetweenwhichthingstothroworgiveawayandwhichtokeep.ThewayweletgoofthingsintheKo...
What determines the mass of the most massive star cluster in a galaxy: statistics, physics or disruption?doi:10.1007/s10509-009-0102-yIn many different galactic environments the cluster initial mass function (CIMF) is well described by a power law with index −2. This implies a linear ...
aput the safety and comfort at the first place. 投入安全和舒适在冠军。[translate] aI bilive nothing can stop us I bilive没什么可能停止我们[translate] a利用色板调色并确定色母号 Mixes colors using the color plate and determines the color female number[translate] ...
A new study has narrowed down the region of the genome that drives the black color in throat and face of warblers by studying the hybrid offspring produced when two species mate. The hybrids of golden-winged and blue-winged warblers have a mix of colorat
Aperture (Size of Objective Lens/Primary Mirror) The focal length determines your field of view and will impact how far you will be able to see through your telescope and aperture will determine how much light you will capture and the level of detail. These two factors will create a unique...
On a daily basis, the moon appears to move eastward in the sky by 12°, and this determines different angles of its illumination by the sun. As it orbits Earth, the moon will show different illuminated parts based on the angle to the sun and hence the phases of a lunation. Although ...
What event signals the end of the main-sequence life of a star? What physical property determines the ultimate fate of a star? How does the luminosity of a giant star compare with the luminosity of a main- sequence star of the same spec...
What determines the color of photons? A light wave has a 660 nm wavelength in air. Its wavelength in a transparent solid is 390 nm. Part A) What is the speed of light in this solid? Part B) What is the light's frequency in the solid? 1. How are the E & B fields in a light...