The half-life of Cs-137 is approximately:

Related MCQs

• The radiation from 37 GBq (1 Ci) of Co-60 (0.145 Gy or 14.5R at 30.5 cm or 1 foot) is attenuated in air to approximately 5mR/h at a distance of approximately:
• When a mercury vapour black light is inadvertently cut off, approximately how long should it be allowed to cool before attempting to restart?
• One half value layer of lead for Iridium-192 is approximately:
• One half value layer of lead for Cobalt-60 is approximately:
• Approximately what energy X ray machine would be required to have penetrating power equivalent to a Cobalt-60 source:
• The half-life of Co-60 is approximately:
• The half-life of Ir-192 is approximately:
• The average energy of a Cs-137 source is approximately:
• The average energy of a T3-170 source is approximately:
• If the required X ray exposure time for a 225 kV, 5 mA exposure is 3 minutes, approximately what exposure time would be required at 10 mA?