A system has 410 J of potential energy and 80 J of kinetic energy. Then 90 J of the potential energy is converted into kinetic energy. How much work was done on the system?

If you drop a baseball with the mass of 135 grams and drop a softball with the mass of 270 grams which one would hit the ground first

Two identical, unlabeled boxes are transported to an orbiting space station. The astronauts know that one box is filled with a light sample of ants for an experiment, and the other is filled with heavy tools for repairs.

Covalent bonds ___ conduct electricity well. Always Usually Rarely Never

What is said to be in a state of equilibrum

An advantage of parallel circuits is that they A) Stop transmitting all current if even one resistor breaks. B) Form a single path through which the current flows. C) Allow current flow even if some paths are cut.

At what phase would you expect to find extremely high and low tides?

The Law of Gravitation was mathematically defined by who?

If two cars had the same engine, which delivered the same force to the wheels, but the first car was more massive than the second would the cars perform differently?

The two subspecies ties of astronomy are

Which best explains why scientific theories grow stronger over time?