Answer:
The amount of heat flows per second in given aluminium bar is 3.066 .
Explanation:
We know that , amount of heat flowing per second is given by
Where A = area =
K = Thermal conductivity =
L = Length =
Upon substituting these values in above equation we get ,
Heat flowing per second =
Answer:
Im so so sorry but I do now know how to do this
Explanation:
For any wave situation,
Frequency = (wavespeed) / (wavelength) .
Frequency of the whistle = (340 meters per second) / (1.7meters) =
200 per second = <em>200 Hz</em> .
(1 Hz = 1 per second)
Answer:
L = 0.1379 m = 13.79 cm
Explanation:
The Rayleigh criterion establishes that two objects are separated when the maximum of diffraction for slits coincides with the minimum of the other point, therefore the expression for the diffraction
a sin θ = m λ
the first zero occurs when m = 1
let's use trigonometry to find the angle
tan θ = y / L
as in these experiments the angles are very small
tan θ = sin θ /cos θ = sin θ
sin θ = y / L
we substitute
a y /L = λ
In the case of circular aperture the system must be solved in polar coordinates, for which a numerical constant is introduced
a y / L = 1.22 λ
L = a y / 1.22 λ
We search the magnitudes to the SI system
a = 1.04 cm = 1.04 10⁻² m
y = 9.09 10⁻⁶ m
λ = 562 10⁻⁹ m
let's calculate
L =
L = 1.379 10⁻¹ m
L = 0.1379 m = 13.79 cm
Absorbance of a mixture solution is additive. That mean the total absorbance at a perpendicular wavelength is the sum of the absorbance of its components at that wavelength.
This can be demonstrated through the sum of the absorbance in the solutions for which it is necessary to add to each specific absorbance its respective wavelength. Mathematically this is:
Therefore the correct option is A.