Astudent of physics applies a constant force of 25newtons while lifting a heavy physics book up into the air a distance of 2.0meters. how much work does the student do on the book?
1) 0joules, because gravity pulled down on the book
2) 5.0joules
3) 50 joules
4) the answer cannot be found without knowing the mass of the book.
5) the answer cannot be found without knowing the net force on the book.

What is the name for the remnant of an asymptotic giant that has lost its shells? black dwarf white dwarf yellow giant black hole

Need only answer if you think you know it

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.