Point charge 3.5 μc is located at x = 0, y = 0.30 m, point charge -3.5 μc is located at x = 0 y = -0.30 m. what are (a)the magnitude and (b)direction of the total electric force that these charges exert on a third point charge q = 4.5 μc at x = 0.40 m, y = 0?

Ahonda civic travels in a straight line along a road. its distance x from a stop sign is given as a function of time t by the equation x(t)= î± t2â î² t3, where î± = 1.53 m/s2 and î² = 5.50ã10â2 m/s3 .

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

What are similarities and differences between refraction, reflection, diffraction and absorption?