Answer:
Re = 1 10⁴
Explanation:
Reynolds number is
Re = ρ v D /μ
The units of each term are
ρ = [kg / m³]
v = [m / s]
D = [m]
μ = [Pa s]
The pressure
Pa = [N / m²] = [Kg m / s²] 1 / [m²] = [kg / m s²]
μ = [Pa s] = [kg / m s²] [s] = [kg / m s]
We substitute the units in the equation
Re = [kg / m³] [m / s] [m] / [kg / m s]
Re = [kg / m s] / [m s / kg]
RE = [ ]
Reynolds number is a scalar
Let's evaluate for the given point
Where the data for methane are:
viscosity μ = 11.2 10⁻⁶ Pa s
the density ρ = 0.656 kg / m³
D = 2 in (2.54 10⁻² m / 1 in) = 5.08 10⁻² m
Re = 0.656 4 2 5.08 10⁻² /11.2 10⁻⁶
Re = 1.19 10⁴
The maximum height on moon is HIGHER than the maximum height on earth
Because chemical changes result in different substances, they often cannot be undone. Some chemical changes can be reversed, but only by other chemical changes.
An example of a mechanical wave is a sound wave
Answer:
31.96362 °C
Explanation:
= Mass of air in the room = 947 kg
= Mass of air entering the room = 62.4 kg
= Temperature in the room = 33.2°C
= Temperature air entering the room = 13.2°C
T = Equilibrium temperature
c = Specific heat of air = 1006 J/kg °C
In the case of thermal equilibrium we have the relation
The temperature of thermal equilibrium is 31.96362 °C
