Define herbivore, carnivore, omnivore, and scavenger.

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

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

Which is an example of a highly unstable isotope that is often used in fission reactions?