Magnitude is basically the measurement,
distance is the total ground that you covered. If you started at point a, walked ten feet to point b, then turned around and walked 13 feet to point c, your total distance would be 10 + 13 = 23 feet
using the same example, your displacement is only how far away you are from the starting point. So point b doesnt matter, because you end up passing through point a again (I hope that made sense :o) and the magnitude of your displacement would be 3 feet
Answer:
radio waves
Explanation:
radio waves have lower frequency than visible light
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
Answer:
The coefficient of kinetic friction is
Explanation:
Let us call the force of friction, then we know that is what has caused the acceleration :
Now this frictional force relates to the coefficient of kinetic friction by
where is the normal force.
Putting in numbers and solving for we get:
Hence, the coefficient of kinetic friction is 0.07.
I believe the answer should be C!