A Sample of a Radioacitive Isotope Has an Activity of 80

question 21

Multiple Choice

A sample of a radioacitive isotope has an activity of 80 μCi when produced. 60 min later when it is being used the activity has dropped to 10 μCi. What is the half-life of this isotope?

• A)60 min
• B)30 min
• C)20 min
• D)15 min

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Definitions:

Electronic Stability Control

A safety technology that automatically detects and reduces loss of traction (skidding), helping to prevent the vehicle from veering off course.

Antilock Brake Systems

A safety system in vehicles that prevents the wheels from locking up during braking, allowing the driver to maintain steering control.

Permanent-Magnet Wheel Speed Sensor

A sensor that uses a permanent magnet to detect wheel speed, often used in anti-lock braking systems.

Analog

Pertaining to or using signals or information represented by a continuously variable physical quantity such as spatial position or voltage.