Is the study of muscle movements in the human body an example of biology

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

What are the north and south poles of a solenoid change with?

What do the atoms of elements in the same group have in common? a. they have the same atomic numbers. b. they have the same average atomic masses. c. they have the same number of electron shells. d. they have the same number of electrons in their outermost shells.