When we boiling the ice, why after about 15 minutes the temperature of it doesn't change anymore? ( answer by temperature/molecules/phase change)

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

The p sub shell can hold up to 8 electrons in an atom. true or false?

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5