Humming bird flits from flower to flower. over a period of 10 minutes, it travels 40 meters. the average speed of the humming bird is /min.

As we know that average speed is given by the ratio of total distance covered and total time of motion so we will have

now we have

distance covered = 40 meter

time taken by the bird = 10 minutes

now in order to find the average speed of the bird

so the average speed of the bird is 4 m/min

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

insects!

explanation: