Why do we balance chemical equations

Water waves and light waves are both examples to

A graduated cylinder has a mass of 50g when empty. when 30 mL of water is added, the graduated cylinder has a mass of 120g. if a rock is added to the graduated cylinder, the water level rises to 75mL and the total mass is now 250g.

If 2 trains are going at the speed of sound then what is the speed they will stop at

In a longitudinal wave, the places where particles of matter are closer together called

The three classes of rocks are sedimentary, metamorphic, and igneous. How are rocks classified into one of these three groups?

Charlotte, a 60.0-kg skin diver, shoots a 2.0-kg spear with a speed of 15 m/s at a fish who darts quickly away without getting hit.

All objects are attracted to each other by the force of a. weight. b. mass. c. inertia. d. gravity.

landslides and mudslides caused by lava flows are ___ deadly than the lava flow itself. a. more b. less

3. How is electric potential different than electric potential energy?

Ethan pushes a wooden box across a carpet floor then he pushes the same box across a smooth marble floor why does Ethan find it easier to push the box on the marble floor than carpet floor