Cold fusion has
a. solved the world's energy crisis
b. been used to create superheavy elements
c. been achieved using muons
d. rendered nuclear reactors obsolete
B, C
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An ideal massless spring with a spring constant of 2.00 N/m is attached to an object of 75.0 g. The system has a small amount of damping
If the amplitude of the oscillations decreases from 10.0 mm to 5.00 mm in 15.0 s, what is the magnitude of the damping constant b? A) 0.0100 kg/s B) 0.00693 kg/s C) 0.00762 kg/s D) 0.00857 kg/s E) 0.0462 kg/s
Which of the following is the correct electron dot structure for chlorine (atomic no. = 17)?
A) a
B) b
C) c
D) d
E) e
A straight wire carries a current of 40 A in a uniform magnetic field (magnitude = 80 mT). If the force per unit length on this wire is 2.0 N/m, determine the angle between the wire and the magnetic field
a. either 39° or 141° b. either 25° or 155° c. either 70° or 110° d. either 42° or 138° e. either 65° or 115°
A coil lies flat on a table top in a region where the magnetic field vector points straight up. The magnetic field vanishes suddenly. When viewed from above, what is the sense of the induced current in this coil as the field fades?
A) The induced current flows counterclockwise. B) The induced current flows clockwise. C) There is no induced current in this coil. D) The current flows clockwise initially, and then it flows counterclockwise before stopping. E) The current flows counterclockwise initially, and then it flows clockwise before stopping.