Physics · May / June 2019 · Paper 11 · Question 13

Some doctors measure blood pressure by using a mercury manometer. Blood pressure varies by 5.6 kPa as a heart beats. The density of mercury is 14 000 kg/m³ and the gravitational field strength g is 10 N/kg. What is the change in the height difference between the levels in the manometer during a heartbeat?

1. A40 mm
2. B80 mm
3. C400 mm
4. D800 mm

As printed in the paper