In a lab, you perform a double slit experiment to measure the wavelength of a particular laser. When aimed at two slits spaced by 0 . 2 2 m m 0.22mm an interference pattern is formed on a screen 0.5 m away. You measure that 10 bright lines of the interference pattern cover a total of 1 . 3 c m 1.3cm width on the screen. What is the wavelength of the laser light? 572 nm is not the answer

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.