The charges that are free to move in a metallic conducting wire and that are responsible for the flow of electric current are- a. the positively charged protons b. the positively charged electrons c. the neutrons of heavy metallic nuclei d. the negatively charged electrons e. the negatively charged protons

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

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants

It takes a lot of energy to get the temperature of water to increase and eventually boil because water has a high heat.