Which correctly lists the three methods of heat transfer?

The “death throes” of stars are amongst the most complex phenomena in all of astronomy, and the “corpses” of stars amongst the most energetic and exotic objects in existence. beginning at the end of the core helium fusion stage in a star’s life, describe in detail the post-main sequence development of both (a) a 1.0 solar mass star, and (b) a 25.0 solar mass star. in what significant ways do they differ? what role does each of these types of stars play in the "star-gas-star" cycle and the evolution of chemical elements in our galaxy?

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.