Two charges of magnitude ‒Q and +4Q are located as in the figure below. At which position (A, B, C, D or E?) will the electric field due to these two charges be zero?

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

Oxygen and hydrogen gas are at the same temperature t.what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.