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2)
11
Na
22.98977
Consider the element sodium. It's atomic number is
and equals
A)
11; the number of protons
B)
12; the number of neutrons
23; the sum of protons and neutrons
D)
23; the number of electrons

This is the substance(s) formed in a chemical reaction.

Aforce of 100 newtons is used to move an object a distance of 15 meters with a power of 50 watts. find the work dine and the time it takes to do the work

Friction removes energy from objects in motion. which statement best describes how this works? a) friction transforms ke into thermal energy b) friction transfers thermal energy to ke c) friction transforms te into pe d) friction transforms pe into ke e) friction transfers ke into pe