In the above H-R diagram sketch, which star is a red giant?
A. A
B. B
C. C
D. D
E. E
Answer: D
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Two bodies P and Q on a smooth horizontal surface are connected by a light cord. The mass of P is greater than that of Q
A horizontal force (of magnitude F) is applied to Q as shown in the figure, accelerating the bodies to the right. The magnitude of the force exerted by the connecting cord on body P will be A) zero. B) less than F but not zero. C) equal to F. D) greater than F.
Briefly describe the order of creation of normal matter in the Big Bang
What will be an ideal response?
The square of the wave function of a particle, |?(x)|2, gives the probability of finding the particle at the point x
A) True B) False
Almost every action performed by a living cell is carried out by:
A) physical forces within each cell. B) chemicals it manufactures. C) gravitational forces within each cell. D) electric impulses transmitted by each cell.