1. How far away is Betelgeuse from Earth with a parallax of 0.005 arcseconds? (givens, equation, solve with units) 6. How far away is Rigel from Earth with a parallax of 0.0038 arcseconds? (givens, equation, solve with units)

9. Proxima Centauri is 4 x 10^16 m from Earth and has an apparent brightness of 3.2 x 10^-11 W/m^2. What is its luminosity? (givens, equations, solve with units)

10. What is the luminosity of Spica that is 2.5 x 10^18 m from Earth and has an apparent brightness of 6 x 10^-8 W/m^2? (givens, equation, solve with units)

14. Regulus on average is 10,300 K with a luminosity of 1.1 x 10^29 W. What is its radius? (givens, equation, solve with units)

15. Castor has an average surface temperature of 3820 K and a luminosity of 2.8 x 10^25 W. What is its radius? (givens, equation, solve with units)

The diagram below represents a marine food web and a process that can harm the human population. each circle represents an organism and the smaller dots inside them represent a toxic substance. what is being represented and how does it harm the population? the diagram represents biological half-life, in which toxins build up in organisms higher up on the food chain, and this can negatively impact humans who consume the organisms and the toxic substance. the diagram represents biomagnification, in which toxins build up in organisms higher up on the food chain, and this can negatively impact humans who consume the organisms and the toxic substance. the diagram represents the process by which different organisms prey upon each other; this can impact the human population by reducing the number of organisms that do not contain the toxin. the diagram represents the way that toxins are metabolized by living organisms, with those at greater trophic levels able to metabolize more efficiently than those at lower levels. this means that those at higher tropic levels are safer for humans to consume compared to the organisms at lower trophic levels.

{answer found. it's (3 ) }which statement describes the cell cycle? (1)the cell cycle is a process in which one cell divides into four genetically different cells. (2)the cell cycle is a process in which one cell divides into two genetically different cells. (3)the cell cycle is a process in which one cell divides into two genetically identical cells. (4)the cell cycle is a process in which one cell divides into four genetically identical cells.

Which of the following best describes the relationship between glucose and complex molecules such as hormones?