This question is about magnetisation. I will give brainliest!!

Aspectroscope breaks light up into its colors, allowing scientists to analyze light from the solar system and universe. by studying the spectral line patterns, widths, strengths and positions, scientists can determine the speed, position, and of celestial bodies. a) age b) origin c) rotation d) temperature

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.

Identify the type of heat transfer occurring when chocolate melts in your hand