A star's absolute visual magnitude depends on its _______________ and _______________
Fill in the blank(s) with correct word
temperature, diameter
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The Babcock model explains:
A) the changes in the wavelengths of radiation. B) the process behind quantum jumps. C) how the Coulomb force helps in binding electrons to an atom. D) the reversal of the Sun's magnetic field from cycle to cycle.
What is a magnetosphere? What are charged particle belts?
What will be an ideal response?
Friction: A driver in a 1000-kg car traveling at 24 m/s slams on the brakes and skids to a stop. If the coefficient of friction between the tires and the level road is 0.80, how long will the skid marks be?
A. 37 m B. 30 m C. 46 m D. 34 m
Which of the following analogies best describes how the structure of the galaxy's spiral arms is maintained?
A) Like military jets flying in formation above a football stadium, the stars in the spiral arms keep a spiral-shaped formation as they orbit the galaxy. B) Like cars slowing in traffic to look at an accident, stars slow as they pass through the spiral arms. C) Like a coiling rope, the spiral arms wind up tighter with every galactic rotation. D) Like the fins of a giant pinwheel toy, the spiral arms carry a set of bright stars around as they sweep through the galaxy.