Radiation Doses: A 70-kg researcher absorbs 4.5 × 108 neutrons in a work day, each of energy 1.2 MeV. The relative biological effectiveness (RBE) for these neutrons is 10. What is the equivalent dosage of the radiation exposure for this researcher, in millirem?
A. 1.2 mrem
B. 0.39 mrem
C. 0.77 mrem
D. 3.7 mrem
E. 12 mrem
Answer: A
You might also like to view...
When an atom has an electron removed, then its net charge is
A. negative. B. unchanged. C. positive. D. It is impossible to remove an electron from an atom
A horizontal force of magnitude 6.5 N is exerted tangentially on a Frisbee of mass 32 grams and radius 14.3 cm. Assuming the Frisbee, a uniform disk, is originally at rest and the force is exerted for 0.08 s, determine the angular velocity of rotation about the central axis when the Frisbee is released.
What will be an ideal response?
In an isolated battery (not connected to an electrical circuit),
A) there are excess electrons on the positive terminal but no excess of protons on the negative terminal. B) there is no excess of electrons or protons on either terminal. C) there are excess protons on the negative terminal and excess electrons on the positive terminal. D) there are excess electrons on the negative terminal and excess protons on the positive terminal. E) there are excess electrons on the negative terminal but no excess protons on the positive terminal.
A 15-m rope is pulled taut with a tension of 140 N. It takes 0.545 s for a wave to propagate along the rope. What is the mass of the rope?
A) 1.7 kg B) 2.1 kg C) 2.8 kg D) 5.1 kg E) 3.2 kg