A light ray, traveling parallel to the axis of a convex thin lens, strikes the lens near its midpoint. After traveling through the lens, this ray emerges traveling obliquely to the axis of the lens . a) such that it never crosses the axis again.
b) crossing the axis at a point equal to twice the focal length.
c) passing between the lens and its focal point.
d) passing through its focal point.

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

If the new moon happens on january 15th, what shape will it be on february 6th?