An experiment is designed to compare the differences in learning outcomes between learning math from a video game and learning it from traditional classroom activities. the experiment finds no difference between the two. what is the dependent variable?

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects