When a nucleus of U-238 absorbs a neutron and becomes U-239, a beta emission, then another beta emission results in
A) Th-239.
B) Pa-239.
C) U-235.
D) Pu-239.
E) Pb-206.
Answer: D
You might also like to view...
The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy states involved in laser action? (c = 2.9979 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.6022 × 10-19 J)
A) 1.537 eV B) 1.646 eV C) 1.786 eV D) 1.812 eV E) 3.572 eV
Which is closest to the temperature of the core of the Sun?
A) 10,000 K B) 100,000 K C) 1 million K D) 10 million K E) 100 million K
According to the universal law of gravitation, the force due to gravity is
A) not dependent on the distance between objects. B) directly proportional to the distance between objects. C) directly proportional to the square of the distance between objects. D) inversely proportional to the distance between objects. E) inversely proportional to the square of the distance between objects.
An electrical generating plant operates at a boiler temperature of 225°C and exhausts the unused heat into a nearby river at 25.0°C. If the generating plant has a power output of 850 megawatts (MW) and if the actual efficiency is 3/4 the theoretical efficiency, how much heat per second must be delivered to the boiler? (0°C = 273 K)
a. 8 470 MW b. 4 230 MW c. 2 120 MW d. 2 820 MW e. 1 690 MW