7. The picture below is a simple machine. What type of simple machine is it?(The simple machine is a doorknob) O pulley
inclined plane
O wheel and axle
screw

The table describes how some substances were formed substance 19 description formed by boiling pure water formed by combining three hydrogen atoms to every nitrogen atom formed by adding 5 g of sugar to 1 l of water formed by compressing carbon under high pressure based on the given descriptions, which substance is most likely a mixture?

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

Stage in which a typical star has completely stopped fusion