Por qué el punto de ebullición de los alcoholes varia menos que el punto de fusión?

Two friends at different locations want to communicate with each other by sending low energy signals. which of the following methods can they use to communicate? a) produce x-rays using colliding electrons and send them to radios, which capture sound b) send messages using infrared radiation, which travel in the form of waves c) send radio waves through intervening media like radio and television d) produce sound waves using microwaves from heated objects

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

What is another way to determine mass times acceleration?