You look through a camera toward an image of hummingbird in a plane mirror. the camera is 4.30 m in front of the mirror. the bird is at camera level, 5,000 m to your right and 3.30 m from the mirror. for what distance must you focus the camera lens to get a clear photo of the image : that is , what is the distance between the lens and the apparent position of the image ?

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?