An atom with 4 protons, 5 neutrons, and 4 electrons has an atomic mass of amu. (enter a whole number.)

You notice a very one-dimensional-thinking snail crawling along one rail of a railroad track. naturally, you remove it to a safer place. but before you do, you observe it as it moves from position xi = -92.9 cm to position xf = -64.9 cm along the rail, as measured from a point where one rail abuts the next. what is the snail\'s displacement δx in centimeters?

Abearing is designed to a reduce friction b. support a load c.guide moving parts such as wheels, shafts and pivots d. all of the above

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?