A pipe of length L closed at one end is resonating at its fundamental frequency. Which statement is correct?
A) The wavelength is 4L and there is a displacement node at the pipe's open end.
B) The wavelength is 4L and there is a displacement antinode at the pipe's open end.
C) The wavelength is L and there is a displacement node at the pipe's open end.
D) The wavelength is L and there is a displacement antinode at the pipe's open end.
B
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A current-carrying wire of length 52.0 cm is positioned perpendicular to a uniform magnetic field. If the current is 15.0 A and it is determined that there is a resultant force of 2.3 N on the wire due to the interaction of the current and field, what is the magnetic field strength?
a. 0.29 T b. 0.029 T c. 0.020 T d. 0.38 T e. 0.18 T
The uncertainty principle was formulated by
A. Einstein. B. Bohr. C. Heisenberg. D. Planck. E. Dirac.
A dielectric material such as paper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field between the plates?
A) no change B) becomes stronger C) becomes weaker D) reduces to zero E) cannot be determined without additional information
Which of these are a part of the scientific method?
a. hypothesis b. experiment c. dogma d. observation