Two objects of the same charge are held 20 cm away from each other. The object's distance is changed to 10 cm. What will happen to the objects?

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

In this lab you will use a cart and track to explore various aspects of motion. you will measure and record the time it takes the cart to travel certain distances, and then complete some calculations. in the space below, write a scientific question that you will answer by doing this experiment.

The heat fusion is the amount of heat required to__ a- evaporate 1 g of liquid into gas b-make a substance subliminate c- melt 1g of solid into liquid d-make material combust