Atomic and Nuclear Physics Answers

Sodium-24 has a half-life of 15 hours. If a sample of sodium-24 has an original activity of 500 Bq, what will its activity be after 30 hours?

In a certain chain reaction, each fission event releases on average two neutrons that go on to cause further fission after 0.1 seconds. How many nuclei would have been fissioned 1 second after an initial fission event?

consider a linear temperature scale x have -75.5º X of boiling point of water and -190ºX freezing point. what is the temperature of 2.00ºC on the X scale.

Radon has a half life of 56 seconds after what time will it’s activity be reduced to 90 percent

An electric sign contains three flashing lights,red, yellow and green, the red light flashes on every 10 seconds, the yellow light flashes on every 15 seconds and the green light flashes on every 18 seconds. If they are switched on together, after how many seconds will they be on together again

What is projectile

Advantages of linear accelerator

all organic compounds contain carbon but all carbon containing are not organic why?

In a cupboard at the Department of Physics you will find an old Strontium preparation 90Sr which
is 14 years old. A protocol showed that the activity was then measured at 2780 pulses / minute at a background radiation of 210 pulses / minute. The half-life of strontium 90 is 29.1 years.
How many pulses should be measured today, if the background radiation is the same now as then?