The longest stage in the life cycle of a star is as a(n) ________ star

Fill in the blank(s) with correct word


main sequence

Physics & Space Science

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You are trying to identify a mineral that has been brought to your laboratory.

Physics & Space Science

What is so special about the carbonaceous chondrites?

a. rich in hydrogen and helium b. rich in organic compounds c. rich in nitrogen d. rich in oxygen e. rich in rare metals, such as gold

Physics & Space Science

Conservation of Momentum: You are standing on a skateboard, initially at rest. A friend throws a very heavy ball towards you. You have two choices about what to do with the ball: either catch the ball or deflect it back toward your friend with the same speed as it was originally thrown. Which choice should you make in order to maximize your speed on the skateboard?

A. Catch the ball. B. Deflect the ball back. C. Your final speed on the skateboard will be the same regardless whether you catch the ball or deflect the ball.

Physics & Space Science

Which process does not transfer heat energy between objects?

A. Radiation B. Convection C. Conduction D. Reflection

Physics & Space Science