Answer:
In physics, a frame of reference, or reference frame, is a perspective that one uses to determine if an object is moving.
Explanation:
Answer:
30°
Explanation:
<em>The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.</em>
∠i = ∠r
so as ∠i = 30°
∠r will also be 30°
Answer:
tan theta = -18 / 25 = -35.8 deg
This direction is south of east
Answer:
E = 0 r <R₁
Explanation:
If we use Gauss's law
Ф = ∫ E. dA =
/ ε₀
in this case the charge is distributed throughout the spherical shell and as we are asked for the field for a radius smaller than the radius of the spherical shell, therefore, THERE ARE NO CHARGES INSIDE this surface.
Consequently by Gauss's law the electric field is ZERO
E = 0 r <R₁