The lowest tone to resonate in a pipe of length L that is closed at one end but open at the other end is 200 Hz. Which one of the following frequencies will not resonate in that pipe?
A) 200 Hz
B) 400 Hz
C) 600 Hz
D) 1000 Hz
E) 1400 Hz
B
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In a photoelectric effect experiment, electrons emerge from a copper surface with a maximum kinetic energy of 1.10 eV when light shines on the surface. The work function of copper is 4.65 eV
Which one of the following values is closest to the wavelength of the light? (h = 6.626 × 10-34 J ? s, c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J) A) 220 nm B) 150 nm C) 360 nm D) 1100 nm
Which of the following are the best candidates to search for planets that might harbor extraterrestrial life?
A) low mass stars (less than one-tenth of the mass of the Sun), because these are the most common stars in our galaxy B) solar-mass stars, because they have both a large habitable zone and a long stellar lifetime. C) massive stars (greater than twice the mass of the Sun) because they provide more energy to promote biology D) halo stars, because planets can form in isolation from disruptive stellar encounters E) binary stars, because they provide twice as much energy to promote biology
The focal length of the lens of a simple film camera is 40.0 mm
By what amount should the distance between the lens and the film be increased or decreased to change the focus from a person who is 25 m from the lens to one who is 4.0 m from the lens? A) 0.2 mm B) 0.3 mm C) 0.4 mm D) 0.5 mm E) 0.7 mm
Another name for electric potential difference is ______________
Fill in the blank(s) with correct word