Answer:
1.1775 x 10^-3 m^3 /s
Explanation:
viscosity, η = 0.250 Ns/m^2
radius, r = 5 mm = 5 x 10^-3 m
length, l = 25 cm = 0.25 m
Pressure, P = 300 kPa = 300000 Pa
According to the Poisuellie's formula
Volume flow per unit time is


V = 1.1775 x 10^-3 m^3 /s
Thus, the volume of oil flowing per second is 1.1775 x 10^-3 m^3 /s.
3.25 x 10^2 (ten to the second power)
ANSWER:
0.0562 J
STEP-BY-STEP EXPLANATION:
Angular momentum is expressed in terms of moment of inertia and angular velocity. This is expressed as follows:

Here, I is the angular momentum and ω is the angular velocity.
Angular momentum is mass time the square of the radius of the object. Moment of inertia for a uniform disk is given as,

Here, m is the mass of the disk and r is the radius of the disk.
Replacing:

Convert the units of angular velocity into rad/s.

We replace each data to calculate the angular momentum:

The angular momentum of the uniform disk is 0.0562 J
The distance from the sun to Neptune is about the same as the distance from Neptune to the next closest star, Proxima Centauri