If each frame of a motion picture film is 35 cm high, and 24 frames go by in a second, estimate how many frames are needed to show a two-hour-long movie

a. 1400
b. 25,000
c. 50,000
d. 170,000
e. This cannot be determined without knowing how many reels were used.


d

Physics & Space Science

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How tightly the nucleons in a nucleus are bound together is indicated by the nucleus's

a. atomic number b. mass number c. neutron number d. half life e. binding energy

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What is exchanged between different particles in order to make the forces work?

A. quarks B. leptons C. bosons D. baryons E. electrons

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From what cosmic epoch do the photons in the cosmic background radiation originate?

A) the end of the era of nuclei B) during the era of nucleosynthesis C) during the era of galaxy formation D) the end of the Planck era E) the moment of the Big Bang

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