Pyridine rings can also under electrophilic aromatic substitution. given 2-methoxypyridine below, draw the expected major product by adding in the new substitution.

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

What are the three major branches of natural science? • earth and space science, life science, physical science •earth and space science, physical science, chemistry •physical science, life science, chemistry •life science, chemistry, physics

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device