Why can't we breathe out of our ears?

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

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

The charge on an electron is 1.60218 × 10−19 c and its mass is 9.10939 × 10−31 kg. how strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.5 cm? answer in units of t.