Question

One poise is equivalent to:
A. $0.001$ pascal second
B. $0.0001$ pascal second
C. $0.01$ pascal second
D. $0.1$ pascal second

Answer 1

The unit of the dynamic viscosity is known as poise which is generally expressed in a centimeter-gram-second system of units. The force needed to maintain a unit is being expressed by the poise. With the metric prefix centi- the poise is being often used. In the SI unit a centipoise is one millipascal-second.

Complete step by step solution:
Let's discuss the option given.

OPTION A.
$0.001$ pascal second: Since, $1$ pascal second is equivalent to $10$ poise. Therefore, $1$ poise = $0.1$ pascal second. Hence, The option $0.001$ is incorrect.

OPTION B.
$0.0001$ pascal second: Since, $1$ pascal second is equivalent to $10$ poise. Therefore, $1$ poise = $0.1$ pascal second. Hence, The option $0.0001$ is incorrect.

OPTION C.
$0.01$ pascal second: Since, $1$ pascal second is equivalent to $10$ poise. Therefore, $1$ poise = $0.1$ pascal second. Hence, The option $0.01$ is incorrect.

OPTION D.
$0.1$ pascal second: Since, $1$ pascal second is equivalent to $10$ poise. Therefore, $1$ poise = $0.1$ pascal second. Hence, The option $0.1$ is correct.

Hence, The option D: $0.1$ pascal second is the correct answer.

Note: Poise is the equality or the equal distribution of weight and a state of balance or equilibrium. Viscosity is measured in terms of a ratio of shearing stress to the velocity gradient in a fluid.