Pete is driving down 7th Street. He drives 215 Meters in 20 seconds. Assuming
he does not speed up or slow down, what
is the speed?

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?