Question1
The distance between an object and its image is fixed at 40.0 cm. A converging lens of focal length f = 6.53 cm forms a sharp image for two positions of the lens. What is distance a between these two positions?
Question2
According to measurements made in 1910, a common flea can jump 0.330 m. assume that the flea's original speed is 2.20 m/s, find the angle with respect to the ground at which the flea leaps. (Hint: Use the trigonometric identity sin θ cos θ = 1/2 sin 2θ