An object moves with a constant speed of 30m/s on a circular track of radius 150m, What is the acceleration of the object? A) 0m/s2 b) 0.17m/s2 c) 5.0 m/s2 d) 6.0 m/s2

Imagine you had to physically add electrons, one at a time, to a previously neutral conductor. you add one electron very easily, but the second electron requires more work. in your initial post to the discussion, explain why this is. also, what happens to the work needed to add the third, fourth, fifth, and subsequent electrons

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

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