Photons from a source each have energy 3.30 eV. Photons from a second source have double the frequency of those from the first source. What is the energy of a photon from the second source?
A. 6.60 eV
B. 13.2 eV
C. 1.65 eV
D. 0.825 eV
E. 3.96 eV
A. 6.60 eV
Physics & Space Science
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The speed of a sound wave in air depends on
A) its frequency. B) its wavelength. C) air temperature. D) all of the above E) none of the above
Physics & Space Science
Two forces produce equal impulses, but the second force, F2, acts for a time twice that of the first force, F1. Which force, if either, is larger?
A. F1 B. they are the same C. F2
Physics & Space Science
A rocket engine consumes 450 kg of fuel per minute. If the exhaust speed of the ejected fuel is 5.2 km/s, what is the thrust of the rocket?
A. 42 kN B. 39 kN C. 45 kN D. 48 kN E. 35 kN
Physics & Space Science
Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.The work you do is
a. 0 b. 4 J. c. 100 J. d. none of the above.
Physics & Space Science