how much of the initial mass of a star is lost by the time it completes the triple alpha process?
What will be an ideal response?
25%
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To find the age of a cluster, astronomers must know:
A) the distance to the cluster. B) the number of stars in the cluster. C) the iron content of all the stars in the cluster. D) the orbital motion of all the stars in the cluster.
When it comes near a heavy nucleus, a gamma ray, which is a high energy photon, can "disappear," and in its place there will be produced an electron and a positron, which both have mass. According to special relativity, this pair production is an example of __________
Fill in the blank(s) with correct word
A 40.0-kg child running at a speed 3.00 m/s jumps on a stationary playground merry-go-round at a distance 1.50 m from the axis of rotation of the merry-go-round
The child is traveling tangential to the edge of the merry-go-round which has a 600 kg?m2 moment of inertia about its axis of rotation as she is running. What is the angular speed of the merry-go-round after the child jumps on it? A) 0.788 rad/s B) 0.261 rad/s C) 6.28 rev/s D) 2.00 rad/s E) 3.14 rev/s
Two carbon cylinders have radii 2r and r and the first has length 2L, while the second has length L. What is the resistance of the first if the resistance of the second is 12 
A. 48 
B. 6
C. 12
D. 24