Answer:
The convective heat transfer coefficient of the fluid is 170.4 watts per square meter-degree Celsius.
Explanation:
The Nusselt number (
) is a dimensionless factor which compares the sensitivity of a fluid due to convection with those due to conduction:
(Eq. 1)
Where:
- Convective heat transfer coefficient, measured in watts per square meter-degree Celsius.
- Conductive heat transfer coefficient, measured in watts per meter-degree Celsius.
- Characteristic length, measured in meters.
In addition, the characteristic length of a cylinder is defined by the following formula:
(Eq. 2)
Where:
- Radius of the cylinder, measured in meters.
- Length of the cylinder, measured in meters.
If we know that 
, 
, 
and 
, then the convective heat coefficient is:
From (Eq. 2):
And by (Eq. 1):
The convective heat transfer coefficient of the fluid is 170.4 watts per square meter-degree Celsius.
Answer: C, Temperature difference.
Answer:
During the summer months the sun is always above the horizon and never sets.
During the winter months the sun never rises above the horizon this means there is perpetual darkness for entire winter.
Explanation:
During the summer months the sun is always above the horizon and never sets. The sun moves in a horizontal direction during the day.
In Autumn around September 21, the sun sinks below the horizon, until October the North pole in twilight.
In spring i.e., March 21 the sun rises above the horizon and continues to do so till June 21
During the winter months the sun never rises above the horizon this means there is perpetual darkness for entire winter.
Answer:
a) μ = [kg / m s]
b) D = m²/s
Explanation:
Viscosity is equivalent to a friction force that opposes the movement of fluids, it is defined by the relation
Shear stress = μ speed gradient
Fr/A = μ v₀ / h
Where Fr is the shear force, A the area, h the height and v₀ the velocity of the fluid layer
μ = [kg / m s]
The diffusion coefficient characterizes the ability of a material to move in a given solvent, depending on the size of the solute, the viscosity of the solvent, temperature
J = - D dΘ / dx
J is the broadcast glare
D = [m² / s]
Answer:
The Earth will keep moving unless acted up on by a force
Explanation:
Not A because that's not the law of inertia
It's B because that is pretty much the definition of the law of inertia
Not C because Earth will not stop moving on it's own
Again, not the definition of the law of inertia
