Which of the following is an example of a chemical change?

melting a stick of butter

dissolving salt in water

using magnesium to displace hydrogen gas from water

What is the ecliptic, and why is it tilted with respect to the celestial equator?

How long does it take for a rotating object to speed up from 15.0 to 33.3 rad/s?

Will name the brainiest Phase change requires ... A. an increase in energy B. a decrease in energy C. an increase or decrease in energy D. the destruction of energy E. the creation of energy

In a chemical reaction, the total mass of the reactants is 10.0 grams. The total mass of the products must be:

What is the force of a 12 kg rock falling at 9.8m/s/s

An electric current in a metal consists of moving (A) Protons (B) neutrons (C) electrons

How does the idea of rotating disk in the nebular model explain certain observed celestial phenomena?

If a small child were to release a balloon into the atmosphere, what would happen to the size of the balloon as it makes it way higher in the sky?

Is a aluminum pie plate an element

The age of the solar system can be established by radioactive dating of