What is the difference between a positively and negatively charged object?

Describe the path of a ray that approaches a mirror parallel to the principal axis.

An object is 10. cm from the mirror, its height is 3.0 cm, and the focal length is 2.0 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1.33 -1.33 +0.75 -0.75

Determine the maximum r-value of the polar equation r =3+3 cos 0