Which of these is most likely to be attracted to a magnet?
a. a book
b. electromagnet
c. piece of glass
d. a copper wire

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

Which governments provide garbage collection services to homes and businesses

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?