Q. An artillery shell is fired with an initial velocity of 300 m/s at 55above the horizontal. To clear an avalanche, it explodes on the mountainside 42s after firing. What is the x and y coordinates of the shell where it explodes, relative to its firing point?
Q. The He-Ne laser shines through a slit in the diffraction plate that is 50 cm from the screen. What fringe spacing would you expect for slits E and F if the stated slit spacing is correct? What difference must there be between the patters produced by slits D and E?