Can you teach me how to do half life please? I'm finding it difficult to understand
There are two ways in which they can give you a half life question:
1. As a graph
Look at the highest point on the y-axis usually a measure of Activity in Bq and half that amount. Then go to that amount on the Y axis and find the value that corresponds with it on the x-axis which will be the time, this is the half life. To double-check you have the correct half-life, you can half that Activity value again and check the time it links to.
2. Given Numbers, E.g The Halflife of a radioisotope, The activity at the start and end, etc
If you are given the half-life, and an initial and final activity. And you are asked to calculate the time it takes for the source to decay to the final activity this is what you do.
Initial Activity : 1000000 Bq Final Activity : 62500 Bq Half Life : 8 hours
Do we need to know anything about Newtons Thought Experiment ?
Edit : When a switch is closed in a circuit does that mean current can pass through it ?
No the Newtons Thought Experiment is at higher level.
Yes so if the switch is open theres a gap in the circuit which means current cant flow through it if the switch is closed the current can flow through it
There are two ways in which they can give you a half life question:
1. As a graph
Look at the highest point on the y-axis usually a measure of Activity in Bq and half that amount. Then go to that amount on the Y axis and find the value that corresponds with it on the x-axis which will be the time, this is the half life. To double-check you have the correct half-life, you can half that Activity value again and check the time it links to.
2. Given Numbers, E.g The Halflife of a radioisotope, The activity at the start and end, etc
If you are given the half-life, and an initial and final activity. And you are asked to calculate the time it takes for the source to decay to the final activity this is what you do.
Initial Activity : 1000000 Bq Final Activity : 62500 Bq Half Life : 8 hours
i was reading through these posts thinking I'm screwed as i have no idea what half of this stuff is and started stressing for quite a while.... but then i realised this is a national 5 physics thread and not a OCR GCE one I'm such a retard haha.
Can someone please give an example of a half life question and talk me through how to do it? For some reason, I'm finding this difficult to understand...
Please somebody help i know it's getting late but I dont understand it at all and i am sure there will be loads of questions on half life
i was reading through these posts thinking I'm screwed as i have no idea what half of this stuff is and started stressing for quite a while.... but then i realised this is a national 5 physics thread and not a OCR GCE one I'm such a retard haha.
Hi guys! what do we need to know about space today? And nuclear reactors? Good luck to everyone!
I reckon a question about re-entry could come up. Just know some benefits and risks of space exploration
Fusion - joining up of small nuclei to form a big one , fission - splitting to form two fission products and three neutrons, energy released, fission generates electricity, uranium and plutonium are some atoms that can be used in fission. Fusion occurs in stars.