Neutrons that will initiate the fission of U-235 require speeds that are
A) less than average.
B) about average.
C) more than average.
D) all of the above
E) none of the above
Answer: A
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A generator has 200 turns of wire on a coil of radius 2.00 cm. What rotational speed is necessary to produce an emf of amplitude 4.50 V if the magnetic field in the region of the coil is 0.180 T?
A. 60.0 rad/s B. 16.0 rpm C. 100 rpm D. 500 rpm E. 950 rpm
Elastic Collisions: In the figure showing an isolated system, determine the character of the collision. The masses of the blocks, and the velocities before and after, are shown. The collision is
A. perfectly elastic. B. partially inelastic. C. completely inelastic. D. characterized by an increase in kinetic energy. E. not possible because momentum is not conserved.
If 0.025 eV neutrons were fired through a double slit so that the first order interference occurred at 10°, what is the slit spacing?
A) 2.5 × 10-8 m B) 1.0 × 10-9 m C) 3.1 × 10-11 m D) 1.8 × 10-10 m E) No answer is correct since neutrons cannot act like waves.
The metric system is a decimal system
a. True b. False Indicate whether the statement is true or false