The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg?
Correct answer: D. 8 days
- A. 4 days
- B. 12 days
- C. 16 days
- D. 8 days
- E. None of these
Explanation
A half-life is the time required for half of a radioactive sample to decay. Since 10 mg becomes 5 mg after one half-life, the required time is 8 days.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Physics in Daily Life
Everyday physics explains motion, force, work, power, pressure, heat, light, sound and electricity through familiar devices and natural events. Topics include simple machines, friction, expansion, reflection and refraction, lenses, household circuits, electrical safety and magnetism, with mass distinguished from weight and heat distinguished from temperature.
Practise Physics in Daily Life
343 free Physics in Daily Life MCQs from Everyday Science, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Everyday Science questions like this
Everyday Science is on 40 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Physics in Daily Life questions
The term 'Blue Shift' is used to indicate?
Quartz crystal in quartz watches work on the principle called?
In a railway track, two rails are joined end to end with a gap tin between them because?
The number of spark plugs needed in a diesel engine is__________?
Which of the following is most elastic ?
The instrument which measures very high temperature is____________?