Qualification > Sciences
Edexcel BIOLOGY Doubts!!!!
Weaam:
--- Quote from: obstacle26 on December 04, 2010, 01:20:09 pm ---The graph below shows changes in the blood pressure in the aorta and the left ventricle during two complete cardiac cycles.
(a) On the graph, draw an arrow to show when the left atrioventricular (mitral) valve closes.
(b) Use the information in the graph to calculate the heart rate. Show your working.
Don't know how to calculate the heart rate (b) , anyone explain
Markscheme says: (b) 60 รท 1.0 ; [accept equivalent calculations] = 60 beats per minute ; [accept range 60 to 64], but how does 60 beats come only pressure and time in seconds is given? Thanx in advance :)
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I had this question in an exam xDD
anyways to calculate the heart rate:
1 beat -----> 0.96sec (from graph, since a full beat finishes then)
X beats ----> 60 seconds
Then cross multiply it to get the answer
X = 60/0.96 = 62.5
See the picture if u still dont get it.
Amelia:
--- Quote from: Weaam on December 04, 2010, 02:54:36 pm ---I had this question in an exam xDD
anyways to calculate the heart rate:
1 beat -----> 0.96sec (from graph, since a full beat finishes then)
X beats ----> 60 seconds
Then cross multiply it to get the answer
X = 60/0.96 = 62.5
See the picture if u still dont get it.
--- End quote ---
+rep ;)
Weaam:
--- Quote from: Hamlet on December 04, 2010, 03:35:26 pm ---+rep ;)
--- End quote ---
Thank you ;D
-Cornea:
how can i explain ionization:D i know stupid question though=p
Weaam:
--- Quote from: Pink Princess on December 04, 2010, 04:50:10 pm ---how can i explain ionization:D i know stupid question though=p
--- End quote ---
Ionization is chemistry ?
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