25. why would you not cork (stopper) a chemical in a test tube that you are
heating?

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.

What can you increase the strength of an electromagnet by

The ability to make things happen is also called a. heat b. force c. matter d. energy