A string on a guitar is stretched between two points 30.0 cm apart with a tension of 100 N. The mass/length of the string is 0.003 kg/m. The wavelength of the mode of vibration with the lowest frequency is
A. 0.3 m.
B. 0.4 m.
C. 0.5 m.
D. 0.6 m.
E. 0.7 m.
D. 0.6 m.
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The particle in an atom that carries a negative charge is the ____
a. nucleon b. electron c. negatron d. proton e. neutron
Atoms of materials that are good conductors of electricity have
A. only electrons, and so these electrons are easily moved. B. mostly protons; thus, the negative charges jump easily from atom to atom. C. outer electrons which are loosely bound and thus easily moved. D. no electrons; thus, any that are given to them are easy to move about.
The principle of relativity is
A. momentum is conserved in all reference frames. B. the Earth is a noninertial reference frame. C. the speed of light is constant. D. the laws of physics are the same in all inertial reference frames. E. Newton's second law does not hold at high speeds.
If an object moves with constant velocity,
a. its speed is constant. b. its direction is constant. c. its average speed is constant. d. its distance traveled per unit time is constant. e. all of these