-A ray IA is incident at point A on mirror Mi. After reflection at mirror M1, it is incident,
respectively, at mirrors M2 and M3. Find the
angle which the finally-reflected ray CR
makes with the plane of mirror M3.
30°
40°
50°
60
pls help

Explain using examples, what is simple harmonic motion and why it is an important area of study in physics.

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=