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What evidence do astronomers use to show that the universe is currently expanding?

The Case of the Mystery Nebula Scenario: An astronomer discovers a new nebula (Cloud X) and wants to determine its future. Observation 1: Spectroscope data shows that the light from the nebula is Blue Shifted. Observation 2: The nebula contains a star that is extremely bright (luminous) but has a low surface temperature (appears red). Question: Based on these observations, predict the movement of this nebula relative to Earth and identify the current life-cycle stage of the star within it. Explain how it is possible for a “cool” star to be so bright. (4 Marks)

Which WHMIS symbol features a skull and crossbones inside a red diamond?

Solve the equation x^2y′ = 1 − x^2 + y^2 − x^2y^2,     y(1) = 0.You may leave your answer as an implicit solution.

Find an explicit solution of the equation  x dx − y^2 dy = 0.

Show your work.Solve the equation below. If no solution exists, state that.-2(x+1)=4(1-x)+2x

 Which statement best distinguishes hypoxia from anoxia?  

Maria feels overwhelmed by work and begins exercising daily and planning her schedule to reduce stress. Which coping strategy is she using?