A string on a violin is stretched between two points 20.00 cm apart with a tension of 120.0 N. The mass/length of the string is 0.002000 kg/m. The frequency of the mode next higher than the fundamental mode is
A. 1,400 Hz.
B. 1,322 Hz.
C. 1,225 Hz.
D. 1,558 Hz.
E. 2,120 Hz.
C. 1,225 Hz.
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The force a magnetic field exerts on a current-carrying wire is maximum when the wire is oriented
A) parallel to the magnetic field. B) perpendicular to the magnetic field. C) either of these D) neither of these
In space, a 4.0 kg metal ball moving 30. m/s has a head-on collision with a stationary second ball of equal mass. After the elastic collision, what are the velocities of the balls?
What will be an ideal response?
At 9 a.m. on Monday a radioactive sample contained four million nuclei. At 9 a.m. on Friday three million of these nuclei had decayed. The half-life of this sample is:
a. 5 days b. 4 days c. 3 days d. 2 days e. 1 day
What is the symbol traditionally used to represent wavelength?
a. wl c. ? b. y d. ?