The flash from a camera is an example of a continuous wave

a. True
b. False
Indicate whether the statement is true or false


False

Physics & Space Science

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According to the Big Bang model, in the earlier state of the Universe gamma rays converted into ________.

A. hydrogen and helium B. pairs of matter and antimatter C. pairs of protons and neutrons D. X-rays

Physics & Space Science

Photoelectric Effect: A photocathode having a work function of 2.8 eV is illuminated with monochromatic electromagnetic radiation whose photon energy is 4.0 eV. What is the threshold (cutoff) frequency for photoelectron production? (1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)

A. 6.8 × 1014 Hz B. 2.9 × 1014 Hz C. 7.7 × 1014 Hz D. 8.6 × 1014 Hz E. 9.7 × 1014 Hz

Physics & Space Science

A person is hearing two sound waves simultaneously. One has a period of 1.50 ms and the other one a period of 1.54 ms. What is the period of the beat due to these two waves?

A) 0.040 ms B) 1.5 ms C) 3.0 ms D) 58 ms E) 330 ms

Physics & Space Science

Which of the sailboats shown sails fastest in its forward direction?

1) 1 2) 2 3) 3 4) None sails forward. It is interesting to note that the force of the wind impact is 5) nonexistent on each sail. 6) greatest on 1. 7) greatest on 2. 8) greatest on 3.

Physics & Space Science