Three point charges at q1 x = 0, q2 at x = 5 cm, and q3 at x = 3 cm. Find the ratio of q1:q2 if q3 is at equilibrium

What is the final velocity of the initial velocity of 25 and -50?

World class speed skaters can skate a 3,000-m course in about 4 minutes. what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve