Convert 2.4 milimetre into metre​

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

What object a collides with object b and bounces back its final momentum is?

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell