You push a book across a table. The book moves at a constant speed, but you do not move. What is the net force on the book?

25pts the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Asmall 21 kilogram canoe is floating downriver at a speed of 1 m/s. what is the canoe's kinetic energy?

Write down two additional questions about earth's magnetic field that will make your presentation more informative.