1) Circulation: What is the cardiac output for a person whoseheart beats 70 beat
ID: 60399 • Letter: 1
Question
1) Circulation:
What is the cardiac output for a person whoseheart beats 70 beats/min with a stroke volume of 70 mL?
2) Bioinstrumentation:
An unknown resistor (R3) is connected in series with the two other resistors (R1=20 ohm, R2=25 ohm) across a 15 V battery in the order R1 -> R2 -> R3. An ammeter, which is placed in between the battery and R1, reads a current of 200 mA.
What is...
a- the total resistance of the circuit?
b- the resistance of the unknown resistor, R3?
c- the total current?
d- the current through each resistor?
e- the voltage drop across each resistor?
(Please draw and label the circuit in the question)
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(Source: Biomedical Engineering, Cambridge)
Explanation / Answer
1. cardiac output = heart rate * stroke volume
= 70 * 70 = 140 liter / minute
2nd question is not from biology. is more of physics
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