A steel ball bearing of mass m1 and speed of magnitude v1 has a head-on elastic collision with a steel ball bearing of mass m2 at rest. Rank the speed v1 of m1 relative to v2, the magnitude of the speed of m2, after the collision when       i) m1>m2;       ii) m1 = m2; and     iii) m1

A. v1v2;                   v1>v2


Answer: B

Physics & Space Science

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A. 7.6 N ? m B. 10.7 N ? m C. 12.0 N ? m D. 9.7 N ? m

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Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

If the wavelength of a photon is doubled, what happens to its energy?

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Physics & Space Science