A beam of laser light of wavelength 532.2 nm strikes a thin slit 0.00375 mm wide. After the light passes through the slit, what is the largest angle relative to the original direction of the beam at which the waves are completely canceled when viewed at a far distance from the slit? 3.56
7.12
1.58
9.24

You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a × b = 98k. what is the y-component of vector b?

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)

Directions: count the number of atoms. ar co2 na3po4 so3 nac2h3o2