13. Five parallel rays of light are incident onto a concave reflective surface. They are reflected and pass through a focal point 8.4 cm away along the principal axis. What is the radius of curvature for the concave surface

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.

The slope of a velocity time graph over any interval of time gives the during that interval

Which atomic model was proposed as a result of j. j. thomson’s work?