The process during which a heavy nucleus such as uranium splits into two intermediate-sized nuclei after being struck by a neutron is referred to as
A)
nuclear fission.
B)
nuclear fusion.
A
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A 2.4-kg ball falling vertically hits the floor with a speed of 2.5 m/s and rebounds with a speed of 1.5 m/s. What is the magnitude of the impulse exerted on the ball by the floor?
a. 9.6 N s b. 2.4 N s c. 6.4 N s d. 1.6 N s e. 1.0 N s
What is a curie?
a. The unit of speed of radioactive decay. b. The same unit as an alpha particle or a helium nucleus. c. The half-life of an isotope expressed as a rate instead of a time (i.e., "per second" instead of "seconds"). d. The unit that measures the number of decays in each unit of time that are occurring in a sample. e. The unit of momentum of a radioactive particle.
AC Generator: A circular coil with 600 turns has a radius of 15 cm. The coil is rotating about an axis perpendicular to a magnetic field of 0.020 T. If the maximum induced emf in the coil is 1.6 V, at what angular frequency is the coil rotating?
A. 0.30 rad/s B. 0.60 rad/s C. 0.90 rad/s D. 1.4 rad/sec E. 1.9 rad/s
When a nucleus undergoes beta-minus decay, it changes into
A) another isotope of itself. B) a higher mass number. C) a higher atomic number. D) a higher neutron number. E) a lower proton number.