Answer:
So an MA of 1 then 2 newtons would be required to lift 20 KG
F = Mass Acceleration = 20 x 10 = 200 Newtons so to lift the same mass with 50 newtons then the mechanical advantage hast to be 200 divided by 50 = 4
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
The most useful would be a Journal article, many (not all) possess information enough to replicate the experiment in order to increase its validity and to collaborate with the scientific community.
cheers!
Answer:
an electric motor
Explanation:
electric motor contains an electromagnet that can rotate between poles of a magnet.