Complete Question
The schematics is shown on the first uploaded image
Answer:
For single pane is
For double pane is
Explanation:
Generally the heat loss through a single pane is mathematically represented by Fourier’s law as
=>
=>
Generally the heat loss through a double pane is mathematically represented by Fourier’s law as
=>
=>
Answer:
2270 full wavelengths.
Explanation:
The wavelength of the sound wave (assuming sound speed of
) is
.
Now, assuming the distance to the last row is 1947m, the number of wavelengths that fit into this distance are
which is 2270 full wavelengths.
Hence, there are 2270 full wavelengths between the stage and the last row of the crowd.
Answer:
On 7.8 acres there are 31565.3 square meters
7.8 acres = 31565.3 m²
Explanation:
Conceptual analysis
Acre, square mile and square meter are area units, so their equivalences are in square units.
Known data
1 (mi)² = 640 acres
1 mi = 1609.34 m
Problem development
We know that 1 mile = 1609.34m, then: (1 mile)² = (1609.34m)²=(1609.34)²m²
We apply the known conversion factors to calculate the square meters (X) in 7.8 acres:
We eliminate acres and square miles (mi²) because they are in the numerator and denominator, so the answer is in square meters (m²)
X=31565.3 m²
On 7.8 acres there are 31565.3 square meters
7.8 acres = 31565.3 m²