Please help!!A camera lens 13.3 cm from a flower makes an image at a
distance of 2.25 cm from the lens,
on the film. What is the focal
length of the lens?
(Unit = cm)

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

7types of electromagnetic waves from lowest to highest frequency

An object is placed in front of a concave mirror between the pole and the focus of the mirror, what is the nature of the image formed by the mirror