Without the carbon-oxygen cycle, water vapor would not cycle meteorites would hit earth most life would not exist plants wouldn't receive nitrates

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

Arecipe calls for 1.2 cups of oil. how many liters of oil is this?

In pqr m< p=60 m< q= 30 and m