What kind of energy transformation occurs when you lite a firecracker

When Hannah rubs her hands together on a cold day, the friction converts what energy

Which is a chemical change? A. Splitting water into hydrogen and oxygen. B. Breaking a block of solid ice into smaller pieces. C. Freezing liquid water. D. Boiling Water

What is the simple average of these two velocities (0m/s, 0.4m/s)

How does the climate of coastal regions compare with inland regions?

The term "radiation" refers to hot materials inside the Earth rising towards Earth's surface, cooling, and sinking back down.

Let's say you had a pulley system with a mechanical advantage of 3. If you want to lift a boulder 10 meters off the ground, how far would you have to pull the rope?

For glass fragments to be individualized, what must be true? A. They must fit together B. They must have the same density C. They must look the same D. They must be the same color

In what way would a digital thermometer be preferable to those from a liquid-based thermometer? Digital thermometer readings are easier to use when performing calculations.

Why does the core of the sun contain more helium and less hydrogen than the surface of the sun?

What happens to a light ray passing through the center of a lens?