Answer:
Option (a) is correct.
70 Pa
Explanation:
Pressure is defined as the ratio of thrust acting on the surface per unit area.
If a force of 1 n is acting on a surface of area 1m^2, then we can say the pressure acting on the surface is 1 \frac{N}{m^{2}}[/tex].
The SI unit of pressure is Pa.
[tex]1 Pa = 1 \frac{N}{m^{2}}[/tex]
So, It is 70 Pa.
