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:
= 0.0175 N/C
Explanation:
= drift speed in a copper wire = 7.89 x 10⁻⁵ m/s
μ = mobility of mobile electrons in copper wire = 4.5 x 10⁻³ (m/s)/(N/C)
= magnitude of electric field in the wire
Drift speed is given as
= μ
Inserting the values
7.89 x 10⁻⁵ = (4.5 x 10⁻³)
= 0.0175 N/C
It's called ' interference '.
If the strings are 'in tune' (same frequency) and in phase, then
they overlap to make a louder sound ... CONstructive interference.
If the strings are 'in tune' (same frequency) but out of phase, then
they overlap to make a softer sound ... DEstructive interference.
If the strings are 'out of tune' (different frequencies), then they overlap
to make a sound that's louder at some times and softer at other times.
The louder and softer pattern creates a new sound, called the 'beat'.
Its frequency is the difference in the frequencies of the two strings.
I think the answer is 0.4
so 40%
hope this helps :)
