Which of the following is true of the image produced by a single concave (diverging) lensa a-The image is real only if the object distance is greater than f
b-The image is real only if the object distance is less than f
c-The image is always real
d-The image is always virtual

Which feature indicates that mars resides in the inner region of the solar system

Organelles are 1. responsible for producing power for the cell 2. tiny structures in the cell that carry out the cell's activities 3. responsible for digestion in the cell 4. found outside of the membrane

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.