2. Light from a helium-neon (I=633nm) illuminates two 0.40 apart. A viewing screen is 2.0 behind the slits. What are the distances between the two m = 3 bright fringes and between the two m = 3 dark fringes?

What is work? how much work is done to move an object 0 meters?

What do you think car designers do if the damage caused by a crash test is too severe?

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)