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Q. A cardinal (Richmondena cardinalis) of mass 4.20×10-2 and a baseball of mass 0.140 have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of the baseball's momentum?

Q. light of wavelength 544 nm in air enters a fishbowl filled with water, then exits through the crown glass wall of the container. Find the wavelengths of the light (a) in the water and (b) in the glass.

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Category:- Physics
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