Hi, I thought to calculate the area of inhibition zone you would use πr2 by diving the diameter by 2 to find the radius? I'm not familiar with the πd/4 equation. Thank you
The equation for the area of a circle is pi r^2. r = d/2 so area of a circle is also = pi (d/2)^2 which is the same as saying pi (d^2/2^2) leading to the final equation of pi d^2/4
Anybody else cramming this in 10 mins before the practical?
why is bacillus megaterium used in schools and not any other bacteria? love your videos
Thank you! Could you also do practical 9 please since its on the advanced information list for the summer exams
Of course I can.
what are some control variables for this experiment?
Could you please a whole video on the advanced information for paper 1? Thank you!
I could make a playlist of the relevant videos if that would help?
@@AlevelBiologyHelp That’s still good, thank you for the info :)
Could you please tell me what the dependent variable is in this experiment and how it could be controlled? I’d appreciate it a lot 😊
so the a level biology board just said whats gonna be on the papers for 2022 and its pretty much everything D:
How did your exams go?
Wonderful video. Thank you so much for your work
I have to rewrite a report for this practical...
Thank you VERY much! 😊
Hi I really appreciate your videos can you please make a video on practical 9 please
Hi, I thought to calculate the area of inhibition zone you would use πr2 by diving the diameter by 2 to find the radius? I'm not familiar with the πd/4 equation. Thank you
The equation for the area of a circle is
pi r^2.
r = d/2 so area of a circle is also =
pi (d/2)^2
which is the same as saying pi (d^2/2^2)
leading to the final equation of
pi d^2/4
@@aknzo23 thank you for explaining!
area is pi r squared so why pi d over 4
It's just another way of doing it :) .
Can I have your notes plz?